platform/chrome: cros_ec_sysfs: Add cold-ap-off to sysfs reboot.

Add cold-ap-off to ChromeOS EC sysfs reboot file option, corresponds to
the EC_REBOOT_COLD_AP_OFF flag, that will reset EC and keep AP off.

Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20201221041231.14516-2-pihsun@chromium.org

Author: peter50216

drivers/platform/chrome/cros_ec_sysfs.c

@@ -28,7 +28,7 @@ static ssize_t reboot_show(struct device *dev,
 	int count = 0;
 
 	count += scnprintf(buf + count, PAGE_SIZE - count,
-			   "ro|rw|cancel|cold|disable-jump|hibernate");
+			   "ro|rw|cancel|cold|disable-jump|hibernate|cold-ap-off");
 	count += scnprintf(buf + count, PAGE_SIZE - count,
 			   " [at-shutdown]\n");
 	return count;
@@ -46,6 +46,7 @@ static ssize_t reboot_store(struct device *dev,
 		{"cancel",       EC_REBOOT_CANCEL, 0},
 		{"ro",           EC_REBOOT_JUMP_RO, 0},
 		{"rw",           EC_REBOOT_JUMP_RW, 0},
+		{"cold-ap-off",  EC_REBOOT_COLD_AP_OFF, 0},
 		{"cold",         EC_REBOOT_COLD, 0},
 		{"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
 		{"hibernate",    EC_REBOOT_HIBERNATE, 0},