spl: Rename Kconfig SPL_LEGACY_IMAGE_SUPPORT to SPL_LEGACY_IMAGE_FORMAT

This matches what this support is called in the non-SPL case. The postfix
_SUPPORT is redundant as enabling Kconfig options implies support.
With this we can use CONFIG_IS_ENABLED() as needed.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 84f2847..43485af 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -225,7 +225,7 @@
 	  is y. If this is not set, SPL will move on to other available
 	  boot media to find a suitable image.
 
-config SPL_LEGACY_IMAGE_SUPPORT
+config SPL_LEGACY_IMAGE_FORMAT
 	bool "Support SPL loading and booting of Legacy images"
 	default y if !TI_SECURE_DEVICE && !SPL_LOAD_FIT
 	help
@@ -235,7 +235,7 @@
 
 config SPL_LEGACY_IMAGE_CRC_CHECK
 	bool "Check CRC of Legacy images"
-	depends on SPL_LEGACY_IMAGE_SUPPORT
+	depends on SPL_LEGACY_IMAGE_FORMAT
 	select SPL_CRC32
 	help
 	  Enable this to check the CRC of Legacy images. While this increases
@@ -451,7 +451,7 @@
 
 config SPL_CRC32
 	bool "Support CRC32"
-	default y if SPL_LEGACY_IMAGE_SUPPORT || SPL_EFI_PARTITION
+	default y if SPL_LEGACY_IMAGE_FORMAT || SPL_EFI_PARTITION
 	default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
 	help
 	  Enable this to support CRC32 in uImages or FIT images within SPL.