Airoha EN8801SC PHY is a gigabit PHY used on Edgecore EAP111 so, include
the MTK driver with some cleanups.
Unfortunatelly, there is no specification sheet nor datasheet available
in order to demistify the magic PBUS writes and work on upstreaming
this driver.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
When building MT7629 with ALL_KMODS then we get prompted for
LEDS_SMARTRG_LED and this will break CI and in future buildbot compilation.
It depends on I2C so the symbol is hidden until ALL_KMODS is used and I2C
support is available, so disable the LEDS_SMARTRG_LED symbol in 6.6 config
intentionally as is done in the 6.1 mt7629 config.
Signed-off-by: Robert Marko <robimarko@gmail.com>