sh-pfc: Rename gpio arguments to be consistent with the rest of the code
sh-pfc: Rename gpio arguments to be consistent with the rest of the code

The gpio_get_data_reg() and gpio_setup_data_reg() functions both take an
argument named gpio. The argument contains a GPIO offset for the first
function and a pin index for the second one. Rename them to offset and
idx respectively to match the rest of the code.

Signed-off-by: Laurent Pinchart <ae960578cc5eca7b9b1dbc37d9caa6cb634f35e0@ideasonboard.com>
Tested-by: Yusuke Goda <2cd00a4192f157bd1da9159141fea071bc45ab79@renesas.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs