staging: r8188eu: merge ODM_ConfigMACWithHeaderFile into PHY_MACConfig8188E

The ODM_ConfigMACWithHeaderFile function is only one line. Merge it into
PHY_MACConfig8188E, which is its only caller.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220110124638.6909-8-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>