usb: pd: fix the offset for SVID specific commands

The SVID specific commands in the Command field of the
Structured VDM Header start from 16, not 10. Changing the
value used in VDO_CMD_VENDOR() macro from 10 to 0x10.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>