staging: winbond: Coding Style correction and removal of unused macro

Removed an unused macro. Plus, couple of grammatical and coding style fixes.

1) The macro _INLINE is not used anywhere. Anyways __inline is not portable.
2) Changed comment from "Not use" to "Unused" make it grammatically correct and
   to fit in 80 word limit.
3.) Removed space after *

Signed-off-by: Harsh Kumar <harsh1kumar@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>