USB: serial: cp210x: use usb_control_msg_recv() and usb_control_msg_send()

The new wrapper functions for usb_control_msg() can accept data from
stack and treat short reads as errors. Hence use the wrappers functions.
Please note that because of this change, cp210x_read_reg_block() will no
longer log the length of short reads.

Signed-off-by: Himadri Pandya <himadrispandya@gmail.com>
Link: https://lore.kernel.org/r/20211001065720.21330-3-himadrispandya@gmail.com


[ johan: style changes ]
Signed-off-by: Johan Hovold <johan@kernel.org>