arch/x86/Makefile.inc: Simplify rule for bootblock.debug

The only difference between the ifeq/else/endif guarded rules is the
linker flags specific to x86. Add those flags to LDFLAGS_bootblock,
and only use one rule for bootblock.debug.

Change-Id: I986a93e0418f05fb273512d7efe0573052493332
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/11782
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 1bda5f6..6b71b4a 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -74,6 +74,13 @@
 
 ifeq ($(CONFIG_ARCH_BOOTBLOCK_X86_32)$(CONFIG_ARCH_BOOTBLOCK_X86_64),y)
 
+# x86-specific linker flags
+ifeq ($(CONFIG_ARCH_BOOTBLOCK_X86_32),y)
+LDFLAGS_bootblock += -m elf_i386 --oformat elf32-i386
+else
+LDFLAGS_bootblock += -m elf_x86_64 --oformat elf64-x86-64
+endif
+
 # Add the assembly file that pulls in the rest of the dependencies in
 # the right order. Make sure the auto generated bootblock.inc is a proper
 # dependency. Make the same true for the linker sript.
@@ -105,11 +112,8 @@
 
 $(objcbfs)/bootblock.debug: $(obj)/arch/x86/bootblock.bootblock.o $(obj)/arch/x86/bootblock.bootblock.ld
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"
-ifeq ($(CONFIG_ARCH_BOOTBLOCK_X86_32),y)
-	$(LD_bootblock) $(LDFLAGS_common) -m elf_i386 --oformat elf32-i386 -static -o $@ -L$(obj) $< -T $(obj)/arch/x86/bootblock.bootblock.ld
-else
-	$(LD_bootblock) $(LDFLAGS_common) -m elf_x86_64 --oformat elf64-x86-64 -static -o $@ -L$(obj) $< -T $(obj)/arch/x86/bootblock.bootblock.ld
-endif
+	$(LD_bootblock) $(LDFLAGS_bootblock) -static -o $@ -L$(obj) $< \
+		-T $(obj)/arch/x86/bootblock.bootblock.ld
 
 
 endif # CONFIG_ARCH_BOOTBLOCK_X86_32 / CONFIG_ARCH_BOOTBLOCK_X86_64