emulation/qemu-i440fx: add cmos.default file

Add cmos.default file in order to ease future testing and debugging of
cmos related code.

Change-Id: I7c6a0aa4e38bb08a520e4838fa216c81b50f2917
Signed-off-by: Antonello Dettori <dev@dettori.io>
Reviewed-on: https://review.coreboot.org/16247
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/emulation/qemu-i440fx/Kconfig

@@ -5,6 +5,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select CPU_QEMU_X86
 	select SOUTHBRIDGE_INTEL_I82371EB
 	select HAVE_OPTION_TABLE
+	select HAVE_CMOS_DEFAULT
 	select HAVE_PIRQ_TABLE
 	select HAVE_ACPI_TABLES
 	select BOARD_ROMSIZE_KB_256

src/mainboard/emulation/qemu-i440fx/cmos.default

@@ -0,0 +1,5 @@
+boot_option = Fallback
+baud_rate = 115200
+power_on_after_fail = Enable
+debug_level = Spew
+ECC_memory = Disable