can: tcan4x5x: rename parse_config() function

Rename the tcan4x5x_parse_config() function to tcan4x5x_get_gpios() since the
function retrieves the gpio configurations from the firmware.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: http://lore.kernel.org/r/20200226140358.30017-1-dmurphy@ti.com


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>