soc/intel/skylake: Add int to unsigned

Fix the following warning detected by checkpatch.pl:

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

TEST=Build for glados

Change-Id: Idc2ad265e8ed8cd7fd6d228cfbe4cbbcb9d3ebfc
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18866
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/soc/intel/skylake/chip.h

@@ -408,7 +408,7 @@ struct soc_intel_skylake_config {
 	 *          "\\_SB.PCI0.GPIO", 0, ResourceConsumer)
 	 *          { sdcard_cd_gpio_default }
 	 */
-	unsigned sdcard_cd_gpio_default;
+	unsigned int sdcard_cd_gpio_default;
 
 	/* Use custom SD card detect GPIO configuration */
 	struct acpi_gpio sdcard_cd_gpio;