Kconfig: Move defaults for CBFS_SIZE

We want the question for CBFS size to be next to the rom size in the
mainboard directory, but that doesn't seem to work for how people
want to set the defaults.  Instead of having the list of exceptions
to the size, just set the defaults at the end of kconfig.

- Move the defaults for chipsets not setting HAVE_INTEL_FIRMWARE into
the chipset Kconfigs (gm45, nehalem, sandybridge, x4x)
- Override the default for HAVE_INTEL_FIRMWARE on skylake.
- Move the HAVE_INTEL_FIRMWARE default setting into the firmware
Kconfig file
- Move the location of the default CBFS_SIZE=ROM_SIZE to the end of
the top level kconfig file, while leaving the question where it is.

Test=rebuild Kconfig files before and after the change, verify that
they are how they were intended to be.

Note: the Skylake boards actually changed value, because they were
picking up the 0x100000 from HAVE_INTEL_FIRMWARE instead of the
0x200000 desired.  This was due to the SOC_INTEL_SKYLAKE being after
the HAVE_INTEL_FIRMWARE default.  Affected boards were:
Google chell, glados, & lars and Intel kunimitsu.

Change-Id: I2963a7a7eab037955558d401f5573533674a664f
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/13645
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/Kconfig

@@ -376,17 +376,9 @@ menu "Mainboard"
 
 source "src/mainboard/Kconfig"
 
+# defaults for CBFS_SIZE are set at the end of the file.
 config CBFS_SIZE
 	hex "Size of CBFS filesystem in ROM"
-	default 0x100000 if HAVE_INTEL_FIRMWARE || \
-	  NORTHBRIDGE_INTEL_X4X || \
-	  NORTHBRIDGE_INTEL_GM45 || NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC || \
-	  NORTHBRIDGE_INTEL_IVYBRIDGE_MRC || NORTHBRIDGE_INTEL_IVYBRIDGE || \
-	  NORTHBRIDGE_INTEL_SANDYBRIDGE || \
-	  NORTHBRIDGE_INTEL_NEHALEM || SOC_INTEL_BRASWELL || \
-	  SOC_INTEL_BROADWELL
-	default 0x200000 if SOC_INTEL_SKYLAKE
-	default ROM_SIZE
 	help
 	  This is the part of the ROM actually managed by CBFS, located at the
 	  end of the ROM (passed through cbfstool -o) on x86 and at at the start
@@ -1157,3 +1149,11 @@ config MAX_REBOOT_CNT
 	  Internal option that sets the maximum number of bootblock executions allowed
 	  with the normal image enabled before assuming the normal image is defective
 	  and switching to the fallback image.
+
+config CBFS_SIZE
+	hex
+	default ROM_SIZE
+	help
+	  This is the part of the ROM actually managed by CBFS.  Set it to be
+	  equal to the full rom size if that hasn't been overridden by the
+	  chipset or mainboard.

src/northbridge/intel/gm45/Kconfig

@@ -27,6 +27,10 @@ config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
 	select INTEL_EDID
 	select INTEL_GMA_ACPI
 
+config CBFS_SIZE
+	hex
+	default 0x100000
+
 config BOOTBLOCK_NORTHBRIDGE_INIT
 	string
 	default "northbridge/intel/gm45/bootblock.c"

src/northbridge/intel/nehalem/Kconfig

@@ -25,6 +25,10 @@ config NORTHBRIDGE_INTEL_NEHALEM
 
 if NORTHBRIDGE_INTEL_NEHALEM
 
+config CBFS_SIZE
+	hex
+	default 0x100000
+
 config VGA_BIOS_ID
 	string
 	default "8086,0046"

src/northbridge/intel/sandybridge/Kconfig

@@ -45,6 +45,10 @@ config NORTHBRIDGE_INTEL_IVYBRIDGE
 
 if NORTHBRIDGE_INTEL_SANDYBRIDGE_MRC || NORTHBRIDGE_INTEL_IVYBRIDGE_MRC || NORTHBRIDGE_INTEL_IVYBRIDGE || NORTHBRIDGE_INTEL_SANDYBRIDGE
 
+config CBFS_SIZE
+	hex
+	default 0x100000
+
 config VGA_BIOS_ID
 	string
 	default "8086,0106"

src/northbridge/intel/x4x/Kconfig

@@ -28,6 +28,10 @@ config NORTHBRIDGE_SPECIFIC_OPTIONS # dummy
 	select INTEL_GMA_ACPI
 	select EARLY_CBMEM_INIT
 
+config CBFS_SIZE
+	hex
+	default 0x100000
+
 config BOOTBLOCK_NORTHBRIDGE_INIT
 	string
 	default "northbridge/intel/x4x/bootblock.c"

src/soc/intel/skylake/Kconfig

@@ -64,6 +64,10 @@ config BOOTBLOCK_SOUTHBRIDGE_INIT
 	string
 	default "soc/intel/skylake/bootblock/pch.c"
 
+config CBFS_SIZE
+	hex
+	default 0x200000
+
 config CPU_ADDR_BITS
 	int
 	default 36

src/southbridge/intel/common/firmware/Kconfig

@@ -146,4 +146,10 @@ config LOCK_MANAGEMENT_ENGINE
 
 	  If unsure, say N.
 
+config CBFS_SIZE
+	hex
+	default 0x100000
+	help
+	  Reduce CBFS size to give room to the IFD blobs.
+
 endif #INTEL_FIRMWARE