s390/pai_crypto: return proper error code in paicrypt_init

paicrypt_init() return incorrect error code in case the number
of PAI crypto counters is too high. Change the return code to
-E2BIG.

Please merge with d0b0efedc7fe
Reported-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/kernel/perf_pai_crypto.c

@@ -749,7 +749,7 @@ static int __init paicrypt_init(void)
 		return 0;
 	if (paicrypt_cnt >= PAI_CRYPTO_MAXCTR) {
 		pr_err("Too many PMU pai_crypto counters %d\n", paicrypt_cnt);
-		return -1;
+		return -E2BIG;
 	}
 
 	rc = attr_event_init();		/* Export known PAI crypto events */