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/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index cda65f7..27d227d 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -264,7 +264,7 @@
 	# GPIO needed for eMMC/SD card presence detection
 	select SPL_DM_GPIO
 	select SPL_DM_MMC
-	select SPL_GPIO_SUPPORT
+	select SPL_GPIO
 	select SPL_LIBDISK_SUPPORT
 	select SPL_MMC_SUPPORT