staging: rtl8723bs: core: rtw_ieee80211: Fix incorrectly named function

Fixes the following W=1 kernel build warning(s):

 drivers/staging/rtl8723bs/core/rtw_ieee80211.c:889: warning: expecting prototype for ieee802_11_parse_elems(). Prototype was for rtw_ieee802_11_parse_elems() instead

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-staging@lists.linux.dev
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210414181129.1628598-40-lee.jones@linaro.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>