usb: typec: wcove: Use LE to CPU conversion when accessing msg->header

As LKP noticed the Sparse is not happy about strict type handling:
   .../typec/tcpm/wcove.c:380:50: sparse:     expected unsigned short [usertype] header
   .../typec/tcpm/wcove.c:380:50: sparse:     got restricted __le16 const [usertype] header

Fix this by switching to use pd_header_cnt_le() instead of pd_header_cnt()
in the affected code.

Fixes: ae8a2ca8 ("usb: typec: Group all TCPCI/TCPM code together")
Fixes: 3c4fb9f1 ("usb: typec: wcove: start using tcpm for USB PD support")
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210609172202.83377-1-andriy.shevchenko@linux.intel.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/typec/tcpm/wcove.c

@@ -378,7 +378,7 @@ static int wcove_pd_transmit(struct tcpc_dev *tcpc,
 		const u8 *data = (void *)msg;
 		int i;
 
-		for (i = 0; i < pd_header_cnt(msg->header) * 4 + 2; i++) {
+		for (i = 0; i < pd_header_cnt_le(msg->header) * 4 + 2; i++) {
 			ret = regmap_write(wcove->regmap, USBC_TX_DATA + i,
 					   data[i]);
 			if (ret)