charge_state: Restore chargecontrol v1 for ectool

EC_CMD_CHARGE_CONTROL v1 is still used as a workaround for
chargeoverride, which is not available on some boards. This CL reverts
only the ectool support removed by crrev/c/4828144.

BUG=b:278898714, b:299196526
TEST=None

Change-Id: Iee1b1e29701f6fbb28f845704b69fb6a6670666a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4846121
Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Derek Basehore <dbasehore@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Auto-Submit: Daisuke Nojiri <dnojiri@chromium.org>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>
Reviewed-by: Peter Marheine <pmarheine@chromium.org>

Author: dnojiri

util/ectool.cc

@@ -7677,10 +7677,12 @@ int cmd_charge_control(int argc, char *argv[])
 		}
 		version = 2;
 	} else {
-		fprintf(stderr,
-			"EC doesn't support V2+ of charge control command.\n"
-			"Consider firmware update.\n");
-		return -1;
+		if (argc != 2) {
+			cmd_charge_control_help(
+				argv[0], "Bad arguments or EC is too old");
+			return -1;
+		}
+		version = 1;
 	}
 
 	if (argc == 1) {