[MIPS] checkfiles: Fix "need space after that ','" errors.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/math-emu/dp_mul.c b/arch/mips/math-emu/dp_mul.c
index f237390..48908a8 100644
--- a/arch/mips/math-emu/dp_mul.c
+++ b/arch/mips/math-emu/dp_mul.c
@@ -121,7 +121,7 @@
 		 */
 
 		/* 32 * 32 => 64 */
-#define DPXMULT(x,y)	((u64)(x) * (u64)y)
+#define DPXMULT(x, y)	((u64)(x) * (u64)y)
 
 		{
 			unsigned lxm = xm;