staging:rtl8187se:ieee80211: Fix Sparse Warning for Static Declarations

This patch fixes the following Sparse warnings :

drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:27:4: warning:
symbol 'rsn_authen_cipher_suite' was not declared. Should it be static?
drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c:352:6: warning:
symbol 'ext_ieee80211_send_beacon_wq' was not declared. Should it be
static?

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>