powerpc/powernv: only call OPAL_ELOG_RESEND if firmware supports it

Otherwise firmware complains: "OPAL: Called with bad token 74 !"
as not all OPAL systems have the ability to resend error logs.
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Acked-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/powernv/opal-elog.c

@@ -313,6 +313,7 @@ int __init opal_elog_init(void)
 	}
 
 	/* We are now ready to pull error logs from opal. */
+	if (opal_check_token(OPAL_ELOG_RESEND))
 		opal_resend_pending_logs();
 
 	return 0;