stm32: enable CONFIG_SMSC_PHY
The STM32MP135F-DK board uses the LAN8742 PHY.
Enable CONFIG_SMSC_PHY to have full PHY support.
Signed-off-by: Thomas Richard <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17745
Signed-off-by: Robert Marko <[email protected]>
(cherry picked from commit d981f28f762a559ae50386fa089b050aaaa78555)
Thomas Richard