IMA: Correct Kconfig dependencies for hash selection

IMA uses the hash algorithm too early to be able to use a module.
Require the selected hash algorithm to be built-in.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>

security/integrity/ima/Kconfig

@@ -96,19 +96,19 @@ choice
 
 	config IMA_DEFAULT_HASH_SHA1
 		bool "SHA1 (default)"
-		depends on CRYPTO_SHA1
+		depends on CRYPTO_SHA1=y
 
 	config IMA_DEFAULT_HASH_SHA256
 		bool "SHA256"
-		depends on CRYPTO_SHA256 && !IMA_TEMPLATE
+		depends on CRYPTO_SHA256=y && !IMA_TEMPLATE
 
 	config IMA_DEFAULT_HASH_SHA512
 		bool "SHA512"
-		depends on CRYPTO_SHA512 && !IMA_TEMPLATE
+		depends on CRYPTO_SHA512=y && !IMA_TEMPLATE
 
 	config IMA_DEFAULT_HASH_WP512
 		bool "WP512"
-		depends on CRYPTO_WP512 && !IMA_TEMPLATE
+		depends on CRYPTO_WP512=y && !IMA_TEMPLATE
 endchoice
 
 config IMA_DEFAULT_HASH