Correct SPL use of CMD_HASH

This converts 1 usage of this option to the non-SPL form, since there is
no SPL_CMD_HASH defined in Kconfig

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/hash.c b/common/hash.c
index 9e53545..2ce79b9 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -327,7 +327,7 @@
 
 /* Try to minimize code size for boards that don't want much hashing */
 #if CONFIG_IS_ENABLED(SHA256) || CONFIG_IS_ENABLED(CMD_SHA1SUM) || \
-	CONFIG_IS_ENABLED(CRC32_VERIFY) || CONFIG_IS_ENABLED(CMD_HASH) || \
+	CONFIG_IS_ENABLED(CRC32_VERIFY) || IS_ENABLED(CONFIG_CMD_HASH) || \
 	CONFIG_IS_ENABLED(SHA384) || CONFIG_IS_ENABLED(SHA512)
 #define multi_hash()	1
 #else