After the recent SLB and STAB cleanups, the ppc64 KERNEL_CONTEXT() macro is
no longer used anywhere.  This patch removes it.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>