usb: typec: tcpci_maxim: Drop GPIO includes

This driver includes the legacy GPIO header <linux/gpio.h>,
the new GPIO header <linux/gpio/consumer.h> and
the deprecated OF GPIO header <linux/of_gpio.h> yet
fail to use symbols from any of them, so drop these
includes.

Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210120225045.173556-1-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>