staging: rtl8723bs: fix memory leak on failure path

staging: rtl8723bs: fix memory leak on failure path

cfg80211_inform_bss_frame() may return NULL on failure. In that case,
the allocated buffer 'buf' is not freed and the function returns early,
leading to potential memory leak.
Fix this by ensuring that 'buf' is freed on both success and failure paths.

Signed-off-by: Diksha Kumari <dikshakdevgan@gmail.com>
Reviewed-by: Mukesh Kumar Chaurasiya <mkchauras@linux.ibm.com>
Link: https://patch.msgid.link/20260113091712.7071-1-dikshakdevgan@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>