staging: r8188eu: Simplify code related to SupportICType

This member of struct odm_dm_struct is always set to ODM_RTL8188E for this
driver. Accordingly, the code can be simplified. A number of routines
now are no longer needed and are deleted.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>