i386: fix section mismatch warning in intel_cacheinfo

Fix following warning:
WARNING: arch/i386/kernel/built-in.o(.init.text+0x3818): Section mismatch: reference to .exit.text:cache_remove_dev (between 'cacheinfo_cpu_callback' and 'cache_sysfs_init')

It points out that a function marked __cpuexit is calling a function marked
__cpuinit => oops.

The call happens only in an error-condition which may explain why we have
not seen it before.

The offending function was not used anywhere else - so marked it __cpuexit.

Note: This warning triggers only with a local copy of modpost
      but that version will soon be pushed out.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/i386/kernel/cpu/intel_cacheinfo.c

@@ -743,7 +743,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
 	return retval;
 }
 
-static void __cpuexit cache_remove_dev(struct sys_device * sys_dev)
+static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
 {
 	unsigned int cpu = sys_dev->id;
 	unsigned long i;