Staging: rtl8192e: Fix Sparse warning of cast from restricted __le16 in r8192E_dev.c

This patch fixes the following Sparse warning in rtl8192e/r8192E_dev.c-

drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c:196:34: warning: cast from restricted __le16
drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c:198:33: warning: cast from restricted __le16
drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c:200:33: warning: cast from restricted __le16

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>