common: miiphyutil: no need to check name of mii_dev

common: miiphyutil: no need to check name of mii_dev

The entry name of mii_dev is an array not pointer, so
no need to check.

Signed-off-by: Peng Fan <[email protected]>
Cc: Joe Hershberger <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Bin Meng <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Acked-by: Joe Hershberger <[email protected]>
Reviewed-by: Bin Meng <[email protected]>