fscrypt: unexport fscrypt_initialize()

The fscrypt_initalize() function isn't used outside fs/crypto, so
there's no point making it be an exported symbol.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Eric Biggers <ebiggers@google.com>

fs/crypto/fscrypt_private.h

@@ -13,6 +13,9 @@
 
 #include <linux/fscrypto.h>
 
+/* crypto.c */
+int fscrypt_initialize(void);
+
 /* keyinfo.c */
 extern int fscrypt_get_crypt_info(struct inode *);