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/Kconfig b/arch/Kconfig
index 49813a4..603e6e7 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -230,7 +230,7 @@
 	imply SPL_DM
 	imply SPL_OF_LIBFDT
 	imply SPL_DRIVERS_MISC_SUPPORT
-	imply SPL_GPIO_SUPPORT
+	imply SPL_GPIO
 	imply SPL_PINCTRL
 	imply SPL_LIBCOMMON_SUPPORT
 	imply SPL_LIBGENERIC_SUPPORT
@@ -244,7 +244,7 @@
 	# TPL
 	imply TPL_DM
 	imply TPL_DRIVERS_MISC_SUPPORT
-	imply TPL_GPIO_SUPPORT
+	imply TPL_GPIO
 	imply TPL_PINCTRL
 	imply TPL_LIBCOMMON_SUPPORT
 	imply TPL_LIBGENERIC_SUPPORT