apparmor: fix undefined reference to `aa_g_hash_policy'

The kernel build bot turned up a bad config combination when
CONFIG_SECURITY_APPARMOR is y and CONFIG_SECURITY_APPARMOR_HASH is n,
resulting in the build error
   security/built-in.o: In function `aa_unpack':
   (.text+0x841e2): undefined reference to `aa_g_hash_policy'
Signed-off-by: John Johansen <john.johansen@canonical.com>

security/apparmor/lsm.c

@@ -677,9 +677,9 @@ enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE;
 module_param_call(mode, param_set_mode, param_get_mode,
 		  &aa_g_profile_mode, S_IRUSR | S_IWUSR);
 
-#ifdef CONFIG_SECURITY_APPARMOR_HASH
 /* whether policy verification hashing is enabled */
 bool aa_g_hash_policy = IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT);
+#ifdef CONFIG_SECURITY_APPARMOR_HASH
 module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR);
 #endif