e1000e: Introduce E1000E_LOW_BITS_SET_FUNC

e1000e_set_16bit and e1000e_set_12bit look so similar so define a
generic macro.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
1 file changed