Makefile: Simplify compilation of target-*/cpu.c

All targets except for ppc now have a standalone cpu.c file.
Signed-off-by: NAndreas Färber <afaerber@suse.de>

Makefile.target

@@ -87,32 +87,18 @@ libobj-y += op_helper.o
 endif
 endif
 libobj-y += helper.o
-ifeq ($(TARGET_BASE_ARCH), i386)
+ifneq ($(TARGET_BASE_ARCH), ppc)
 libobj-y += cpu.o
 endif
 libobj-$(TARGET_SPARC64) += vis_helper.o
 libobj-$(CONFIG_NEED_MMU) += mmu.o
 libobj-$(TARGET_ARM) += neon_helper.o iwmmxt_helper.o
-libobj-$(TARGET_ARM) += cpu.o
-libobj-$(TARGET_CRIS) += cpu.o
-libobj-$(TARGET_LM32) += cpu.o
-libobj-$(TARGET_M68K) += cpu.o
-libobj-$(TARGET_MICROBLAZE) += cpu.o
-ifeq ($(TARGET_BASE_ARCH), mips)
-libobj-y += cpu.o
-endif
-libobj-$(TARGET_S390X) += cpu.o
-libobj-$(TARGET_SH4) += cpu.o
 ifeq ($(TARGET_BASE_ARCH), sparc)
 libobj-y += fop_helper.o cc_helper.o win_helper.o mmu_helper.o ldst_helper.o
-libobj-y += cpu.o
 endif
 libobj-$(TARGET_SPARC) += int32_helper.o
 libobj-$(TARGET_SPARC64) += int64_helper.o
-libobj-$(TARGET_UNICORE32) += cpu.o
-libobj-$(TARGET_XTENSA) += cpu.o
 libobj-$(TARGET_ALPHA) += int_helper.o fpu_helper.o sys_helper.o mem_helper.o
-libobj-$(TARGET_ALPHA) += cpu.o
 
 libobj-y += disas.o
 libobj-$(CONFIG_TCI_DIS) += tci-dis.o