selftests: watchdog: Fix error message.

Printf's say errno but print the string version of error.
Make consistent.

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>

tools/testing/selftests/watchdog/watchdog-test.c

@@ -109,7 +109,7 @@ int main(int argc, char *argv[])
 				printf("Last boot is caused by: %s.\n", (flags != 0) ?
 					"Watchdog" : "Power-On-Reset");
 			else
-				printf("WDIOC_GETBOOTSTATUS errno '%s'\n", strerror(errno));
+				printf("WDIOC_GETBOOTSTATUS error '%s'\n", strerror(errno));
 			break;
 		case 'd':
 			flags = WDIOS_DISABLECARD;
@@ -117,7 +117,7 @@ int main(int argc, char *argv[])
 			if (!ret)
 				printf("Watchdog card disabled.\n");
 			else
-				printf("WDIOS_DISABLECARD errno '%s'\n", strerror(errno));
+				printf("WDIOS_DISABLECARD error '%s'\n", strerror(errno));
 			break;
 		case 'e':
 			flags = WDIOS_ENABLECARD;
@@ -125,7 +125,7 @@ int main(int argc, char *argv[])
 			if (!ret)
 				printf("Watchdog card enabled.\n");
 			else
-				printf("WDIOS_ENABLECARD errno '%s'\n", strerror(errno));
+				printf("WDIOS_ENABLECARD error '%s'\n", strerror(errno));
 			break;
 		case 'p':
 			ping_rate = strtoul(optarg, NULL, 0);
@@ -139,7 +139,7 @@ int main(int argc, char *argv[])
 			if (!ret)
 				printf("Watchdog timeout set to %u seconds.\n", flags);
 			else
-				printf("WDIOC_SETTIMEOUT errno '%s'\n", strerror(errno));
+				printf("WDIOC_SETTIMEOUT error '%s'\n", strerror(errno));
 			break;
 		default:
 			usage(argv[0]);