s390/crypto: add cpu feature modaliases for crypto modules

Use the module_cpu_feature_match() module init function to add an
module alias based on required CPU features.   The modules are
automatically loaded on hardware that supports the required CPU features.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/crypto/prng.c

@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/mutex.h>
+#include <linux/cpufeature.h>
 #include <linux/random.h>
 #include <linux/slab.h>
 #include <asm/debug.h>
@@ -914,6 +915,5 @@ static void __exit prng_exit(void)
 	}
 }
 
-
-module_init(prng_init);
+module_cpu_feature_match(MSA, prng_init);
 module_exit(prng_exit);