Staging: rtl8192e: Eliminate use of macro IS_NIC_DOWN

This patch eliminates use of unnecessory macro IS_NIC_DOWN
and replaces it with standard code.

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8192e/rtl8192e/r8192E_phy.c
Simple merge

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

diff --cc drivers/staging/rtl8192e/rtl8192e/rtl_core.h
Simple merge

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