Replace hardcoded numbers with the dt-bindings drive strength macros
defined in "dt-bindings/pinctrl/mt65xx.h".
Signed-off-by: Donghyun Ko <nyankosoftware@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20894
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>