realtek: rtl931x: fix I2C sda pin
The drivers for I2C bus and mux for RTL931x have an incorrectly defined
SDA0 pin number, causing an error with correct pin numbers specified in
the device tree.
Using the `show tech-support board` on the vendor firmware of a Netgear
MS510TXM shows the correct pin numbers but they don't work with the
drivers. So fix this.
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/19171
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>