The phy-gmii-sel can be only auto selected in Kconfig and now the pretty
complex Kconfig dependencies are defined for phy-gmii-sel driver, which
also need to be updated every time phy-gmii-sel is re-used for any new
networking driver.

Simplify Kconfig definition for phy-gmii-sel PHY driver - drop all
dependencies and from networking drivers and rely on using 'imply
PHY_TI_GMII_SEL' in Kconfig definitions for networking drivers instead.
Signed-off-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Tested-by: NMurali Karicheri <m-karicheri2@ti.com>
Tested-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>