drivers: gpio: rts5912 remap gpio number

Provide a map from RTS5912_GPIO_NUM_000 to RTS5912_GPIO_NUM_131
for appication call be easier read.
For example:
Used: <&gpiog 6 (GPIO_OUTPUT)>
Now: <RTS5912_GPIO_NUM_102 (GPIO_OUTPUT)>

Signed-off-by: Elmo Lan <elmo_lan@realtek.com>