powerpc: Remove double braces in alignment code.

Looks like I introduced this when adding LE support.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 34f5552..86150fb 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -908,7 +908,7 @@
 		flush_fp_to_thread(current);
 	}
 
-	if ((nb == 16)) {
+	if (nb == 16) {
 		if (flags & F) {
 			/* Special case for 16-byte FP loads and stores */
 			PPC_WARN_ALIGNMENT(fp_pair, regs);