[MIPS] Remove CONFIG_BUILD_ELF64.
    
This option is no longer usable with supported compilers.  It will be
replaced by usage of -msym32 in a separate patch.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 3d8dac6..c626dd5 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -70,18 +70,20 @@
 
 CHECKFLAGS				= $(CHECKFLAGS-y)
 
-ifdef CONFIG_BUILD_ELF64
-gas-abi			= 64
-ld-emul			= $(64bit-emul)
-vmlinux-32		= vmlinux.32
-vmlinux-64		= vmlinux
-else
+ifdef CONFIG_32BIT
 gas-abi			= 32
 ld-emul			= $(32bit-emul)
 vmlinux-32		= vmlinux
 vmlinux-64		= vmlinux.64
+endif
 
-cflags-$(CONFIG_64BIT)	+= $(call cc-option,-mno-explicit-relocs)
+ifdef CONFIG_64BIT
+gas-abi			= 64
+ld-emul			= $(64bit-emul)
+vmlinux-32		= vmlinux.32
+vmlinux-64		= vmlinux
+
+cflags-y		+= $(call cc-option,-mno-explicit-relocs)
 endif
 
 #
@@ -630,7 +632,6 @@
 ifdef CONFIG_SGI_IP27
 core-$(CONFIG_SGI_IP27)		+= arch/mips/sgi-ip27/
 cflags-$(CONFIG_SGI_IP27)	+= -Iinclude/asm-mips/mach-ip27
-ifdef CONFIG_BUILD_ELF64
 ifdef CONFIG_MAPPED_KERNEL
 load-$(CONFIG_SGI_IP27)		+= 0xc00000004001c000
 OBJCOPYFLAGS			:= --change-addresses=0x3fffffff80000000
@@ -639,16 +640,6 @@
 load-$(CONFIG_SGI_IP27)		+= 0xa80000000001c000
 OBJCOPYFLAGS			:= --change-addresses=0x57ffffff80000000
 endif
-else
-ifdef CONFIG_MAPPED_KERNEL
-load-$(CONFIG_SGI_IP27)		+= 0xffffffffc001c000
-OBJCOPYFLAGS			:= --change-addresses=0xc000000080000000
-dataoffset-$(CONFIG_SGI_IP27)	+= 0x01000000
-else
-load-$(CONFIG_SGI_IP27)		+= 0xffffffff8001c000
-OBJCOPYFLAGS			:= --change-addresses=0xa800000080000000
-endif
-endif
 endif
 
 #