[PATCH] powerpc: Remove duplicate definition of set_tb()

Somewhere along the line we got two definitions of set_tb(). They look to
be identical although they're not textually identical. So remove the #ifdef
CONFIG_PPC64 version, leaving the common version in time.h.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

include/asm-powerpc/reg.h

@@ -585,13 +585,6 @@ static inline void ppc64_runlatch_off(void)
 		mtspr(SPRN_CTRLT, ctrl);
 	}
 }
-
-static inline void set_tb(unsigned int upper, unsigned int lower)
-{
-	mttbl(0);
-	mttbu(upper);
-	mttbl(lower);
-}
 #endif
 
 #define __get_SP()	({unsigned long sp; \