HID: cp2112: Use BIT() in GPIO setter and getter

Use BIT() in GPIO setter and getter for the sake of consistency
with GENMASK() usage elsewhere in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230703185222.50554-10-andriy.shevchenko@linux.intel.com


Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>