s390: remove closung punctuation from spectre messages

There should not be a '.' at the end of the spectre syslog messages.
Remove them.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/nospec-branch.c

@@ -36,9 +36,9 @@ early_param("nospec", nospec_setup_early);
 static int __init nospec_report(void)
 {
 	if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
-		pr_info("Spectre V2 mitigation: execute trampolines.\n");
+		pr_info("Spectre V2 mitigation: execute trampolines\n");
 	if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))
-		pr_info("Spectre V2 mitigation: limited branch prediction.\n");
+		pr_info("Spectre V2 mitigation: limited branch prediction\n");
 	return 0;
 }
 arch_initcall(nospec_report);