pinctrl: pinctrl-nomadik-stn8815: Fix checkpatch error

Fixes the following error:
ERROR: space required after that ',' (ctx:VxV)
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-nomadik-stn8815.c

@@ -299,7 +299,7 @@ static const unsigned i2c0_a_1_pins[] = { STN8815_PIN_D3, STN8815_PIN_D2 };
 static const unsigned u1_b_1_pins[] = { STN8815_PIN_B16, STN8815_PIN_A16 };
 static const unsigned i2cusb_b_1_pins[] = { STN8815_PIN_C21, STN8815_PIN_C20 };
 
-#define STN8815_PIN_GROUP(a,b) { .name = #a, .pins = a##_pins,		\
+#define STN8815_PIN_GROUP(a, b) { .name = #a, .pins = a##_pins,		\
 			.npins = ARRAY_SIZE(a##_pins), .altsetting = b }
 
 static const struct nmk_pingroup nmk_stn8815_groups[] = {