x86: unify tlb.c

arch/x86/kernel/tlb_*.c are functionally identical, so unify them.

---

arch/x86/kernel/Makefile |    2 arch/x86/kernel/tlb.c    |  229 ++++++++++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/tlb_32.c |  190 --------------------------------------
arch/x86/kernel/tlb_64.c |  194 --------------------------------------
4 files changed, 230 insertions(+), 385 deletions(-)

===================================================================

@@ -57,7 +57,7 @@

apm-y := apm_32.o
obj-$(CONFIG_APM) += apm.o
obj-$(CONFIG_X86_SMP) += smp.o
-obj-$(CONFIG_X86_SMP) += smpboot.o tsc_sync.o ipi.o tlb_$(BITS).o
+obj-$(CONFIG_X86_SMP) += smpboot.o tsc_sync.o ipi.o tlb.o
obj-$(CONFIG_X86_32_SMP) += smpcommon.o
obj-$(CONFIG_X86_64_SMP) += tsc_sync.o smpcommon.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline_$(BITS).o
===================================================================

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