rtlwifi: rtl8188ee: Convert driver to use the common DM table init routine

The previous patch created a routine in rtlwifi to initialize dm_digtable.
Driver rtl8188ee is converted to use that routine.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>