platform/chrome: cros_ec_typec: Correct alt mode index

[ Upstream commit 4e477663e3 ]

Alt mode indices used by USB PD (Power Delivery) start with 1, not 0.

Update the alt mdoe registration code to factor this in to the alt mode
descriptor.

Fixes: de0f49487d ("platform/chrome: cros_ec_typec: Register partner altmodes")
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220819190807.1275937-3-pmalani@chromium.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/platform/chrome/cros_ec_typec.c

@@ -691,7 +691,7 @@ static int cros_typec_register_altmodes(struct cros_typec_data *typec, int port_
 		for (j = 0; j < sop_disc->svids[i].mode_count; j++) {
 			memset(&desc, 0, sizeof(desc));
 			desc.svid = sop_disc->svids[i].svid;
-			desc.mode = j;
+			desc.mode = j + 1;
 			desc.vdo = sop_disc->svids[i].mode_vdo[j];
 
 			if (is_partner)