[U-Boot] [U-Boot, 5/5] net: phy: Hide Micrel KSZ9021 and KSZ9031 Kconfig options

[Philipp Tomsich]

> The correct option is PHY_MICREL_KSZ90X1, but some configs still
> select the 9021 and 9031 options, which are deprecated.
> 
> Signed-off-by: Alexandru Gagniuc <alex.g at adaptrum.com>
> ---
>  drivers/net/phy/Kconfig | 24 ++----------------------
>  1 file changed, 2 insertions(+), 22 deletions(-)
> 

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>