staging: ft1000: ft1000-pcmcia: Removed unnecessary parentheses.

This patch removes unnecessary parentheses from control expression.
Removed following checkpatch.pl warning:
WARNING: Unnecessary parentheses

Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>