Makefile: rename linker intermediate variable

Renamed CONFIG_ROMBASE to ROMSTAGE_BASE and removed it from Kconfig.
Removed no-op calculation in ldscript.

Change-Id: I53d39b60f07db76c8537b3133e59360687b9d4a7
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/802
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Rudolf Marek <r.marek@assembler.cz>

src/arch/x86/Kconfig

@@ -8,10 +8,6 @@ config AP_IN_SIPI_WAIT
 	default n
 	depends on ARCH_X86
 
-config ROMBASE
-	hex
-	default 0xffff0000
-
 config RAMBASE
 	hex
 	default 0x100000

src/arch/x86/Makefile.inc

@@ -342,10 +342,10 @@ $(obj)/bootblock.elf: $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.o $(obj)/bootbl
 # Build the romstage
 $(obj)/coreboot.romstage: $(obj)/coreboot.pre1 $$(romstage-objs) $(obj)/romstage/ldscript.ld
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-	printf "CONFIG_ROMBASE = 0x0;\n" > $(obj)/location.ld
+	printf "ROMSTAGE_BASE = 0x0;\n" > $(obj)/location.ld
 	$(CC) -nostdlib -nostartfiles -static -o $(obj)/romstage.elf -L$(obj) -T $(obj)/romstage/ldscript.ld $(romstage-objs)
 	$(OBJCOPY) -O binary $(obj)/romstage.elf $(obj)/romstage.bin
-	printf "CONFIG_ROMBASE = 0x" > $(obj)/location.ld
+	printf "ROMSTAGE_BASE = 0x" > $(obj)/location.ld
 	$(CBFSTOOL) $(obj)/coreboot.pre1 locate $(obj)/romstage.bin $(CONFIG_CBFS_PREFIX)/romstage $(CONFIG_XIP_ROM_SIZE) > $(obj)/location.txt || { echo "The romstage is larger than XIP size. Please expand the CONFIG_XIP_ROM_SIZE" ; exit 1; }
 	cat $(obj)/location.txt >> $(obj)/location.ld
 	printf ';\n' >> $(obj)/location.ld

src/arch/x86/init/bootblock.ld

@@ -25,13 +25,8 @@ OUTPUT_ARCH(i386)
 TARGET(binary)
 SECTIONS
 {
-	. = CONFIG_ROMBASE;
+	. = ROMSTAGE_BASE;
 
-	/* cut _start into last 64k */
-	_x = .;
-	. = (_x < CONFIG_ROMBASE) ? (CONFIG_ROMBASE) : _x;
-
-	/* This section might be better named .setup */
 	.rom . : {
 		_rom = .;
 		*(.rom.text);