Staging: csr: csr_wifi_router_ctrl_sef.c: fix line over 80 characters

This patch fixes line over 80 characters problem found by checkpatch.pl
tool.

Signed-off-by: Jugwan Eom <zugwan@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>