src/lib: Add space before (

Fix the following error detected by checkpatch.pl:

ERROR: space required before the open parenthesis '('

TEST=Build and run on Galileo Gen2

Change-Id: I8953fecbe75136ff989c9e3cf6c5e155dcee3c3b
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18698
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/lib/gpio.c

@@ -137,7 +137,7 @@ int _gpio_base3_value(gpio_t gpio[], int num_gpio, int binary_first)
 		 * now. We know that there can be no binary numbers 1020-102X.
 		 */
 		if (binary_first && !has_z) {
-			switch(temp) {
+			switch (temp) {
 			case 0:	/* Ignore '0' digits. */
 				break;
 			case 1:	/* Account for binaries 0 to 2^index - 1. */