pinctrl: aspeed-g6: Support drive-strength for GPIOF/G

Add drive strength configuration support for GPIO F and G groups.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Link: https://lore.kernel.org/20241023104406.4083460-1-billy_tsai@aspeedtech.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>