staging: rtl8192u: fix bitshift calculation in r819xU_phy.c
staging: rtl8192u: fix bitshift calculation in r819xU_phy.c

This patch uses the ffs linux built-in routine in the
computation of the bitshift to take advantage of
architecture specific instructions that implement this
computation more efficiently.

Signed-off-by: Xenia Ragiadakou <f92ff8bbf231fc2849aa93c2318ee1296285b821@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs