[PATCH] Fix CPUID compilation on x86-64

From: Andi Kleen <ak@muc.de>

A lot of people have run into this: the x86-64 cpuid driver didn't
compile as module.

Using a kludge suggested by Sam Ravnsborg.

arch/x86_64/kernel/Makefile

@@ -25,6 +25,6 @@ obj-$(CONFIG_DUMMY_IOMMU)	+= pci-nommu.o pci-dma.o
 obj-$(CONFIG_MODULES)		+= module.o
 
 bootflag-y			+= ../../i386/kernel/bootflag.o
-cpuid-$(CONFIG_X86_CPUID)	+= ../../i386/kernel/cpuid.o
+cpuid-$(subst m,y,$(CONFIG_X86_CPUID))  += ../../i386/kernel/cpuid.o
 
 obj-$(CONFIG_CPU_FREQ)	+=	cpufreq/