mfd: lpc_ich: Convert gpio_version to be enum

We have an anonymous enum for the GPIO versions. Make it named
and use this type for the gpio_version member of struct lpc_ich_info.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230926190834.932233-2-andriy.shevchenko@linux.intel.comSigned-off-by: Lee Jones <lee@kernel.org>

include/linux/mfd/lpc_ich.h

@@ -15,7 +15,7 @@
 #define ICH_RES_GPE0	1
 
 /* GPIO compatibility */
-enum {
+enum lpc_gpio_versions {
 	ICH_I3100_GPIO,
 	ICH_V5_GPIO,
 	ICH_V6_GPIO,
@@ -29,7 +29,7 @@ enum {
 struct lpc_ich_info {
 	char name[32];
 	unsigned int iTCO_version;
-	unsigned int gpio_version;
+	enum lpc_gpio_versions gpio_version;
 	enum intel_spi_type spi_type;
 	u8 use_gpio;
 };