staging: rtl8188eu: convert rtw_access_ctrl to return bool

Function rtw_access_ctrl returns boolean values, so change the return
type to bool. Also convert the local variables that are used for the
return value from u8 to bool.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191026121135.181897-4-straube.linux@gmail.com


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