Rename SPL_CRYPTO_SUPPORT to SPL_CRYPTO

Rename this option so that CONFIG_IS_ENABLED can be used with it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 56c515b..4110835 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -511,7 +511,7 @@
 	  may improve boot performance. Enable this option to build the
 	  drivers in drivers/cpu as part of an SPL build.
 
-config SPL_CRYPTO_SUPPORT
+config SPL_CRYPTO
 	bool "Support crypto drivers"
 	help
 	  Enable crypto drivers in SPL. These drivers can be used to