crypto: Add spaces around operator

I am reading crypto related code, find some code style problems while
using checkpatch.pl to check crypto folder. Fix the error style
problems.

Signed-off-by: Liyang Shi <shiliyang@huawei.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

crypto/aes.c

@@ -1080,9 +1080,9 @@ int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
 
         rk = key->rd_key;
 
-        if (bits==128)
+        if (bits == 128)
                 key->rounds = 10;
-        else if (bits==192)
+        else if (bits == 192)
                 key->rounds = 12;
         else
                 key->rounds = 14;

crypto/desrfb.c

@@ -93,7 +93,7 @@ void deskey(unsigned char *key, int edf)
                     }
                 for( j = 0; j < 24; j++ ) {
                         if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
-                        if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];
+                        if( pcr[pc2[j + 24]] ) kn[n] |= bigbyte[j];
                         }
                 }
         cookey(kn);