Rename GPIO_SUPPORT to GPIO

Rename these options so that CONFIG_IS_ENABLED can be used with them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index da44511..306ce0f 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -61,7 +61,7 @@
 
 /* simplify defines to OMAP_HSMMC_USE_GPIO */
 #if (defined(CONFIG_OMAP_GPIO) && !defined(CONFIG_SPL_BUILD)) || \
-	(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
+	(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO))
 #define OMAP_HSMMC_USE_GPIO
 #else
 #undef OMAP_HSMMC_USE_GPIO