staging: rtl8192e: Use time_after macro

This patch replaces a condition check for time elapsed with a
simple time_after macro

Signed-off-by: Hari Prasath Gujulan Elango <hgujulan@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8192e/rtl8192e/rtl_ps.c
Simple merge