staging: r8188eu: remove write-only fields from struct dm_priv

The fields bDynamicTxPowerEnable and LastDTPLvl of struct dm_priv
are set but never used. Remove them.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210921194658.10654-5-straube.linux@gmail.com


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