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: ae8a2ca8a221 ("usb: typec: Group all TCPCI/TCPM code together")
Fixes: 3c4fb9f16921 ("usb: typec: wcove: start using tcpm for USB PD support")
Reported-by: kernel test robot <[e-mail]>
Reviewed-by: Heikki Krogerus <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/typec/tcpm/wcove.c

···
 		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)