[POWERPC] Replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/math-emu/frsp.c

@@ -12,7 +12,7 @@ frsp(void *frD, void *frB)
 	FP_DECL_D(B);
 
 #ifdef DEBUG
-	printk("%s: D %p, B %p\n", __FUNCTION__, frD, frB);
+	printk("%s: D %p, B %p\n", __func__, frD, frB);
 #endif
 
 	__FP_UNPACK_D(B, frB);