[PATCH] ppc: fix stupid thinko in oprofile fix

I did something stupid in my oprofile fix, here's the obvious fix:
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/kernel/perfmon.c

@@ -45,9 +45,8 @@ static void dummy_perf(struct pt_regs *regs)
 	mtpmr(PMRN_PMGC0, pmgc0);
 }
 
-#elif CONFIG_6xx
+#elif defined(CONFIG_6xx)
 /* Ensure exceptions are disabled */
-
 static void dummy_perf(struct pt_regs *regs)
 {
 	unsigned int mmcr0 = mfspr(SPRN_MMCR0);