staging: rtl8723bs: merge rtw_os_indicate_disconnect into rtw_indicate_disconnect

staging: rtl8723bs: merge rtw_os_indicate_disconnect into rtw_indicate_disconnect

Merge the functionality of the function rtw_os_indicate_disconnect into the
function rtw_indicate_disconnect to reduce code in the os_dep directory.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Hans de Goede <hansg@kernel.org>
Reviewed-by: Hans de Goede <hansg@kernel.org>
Link: https://lore.kernel.org/r/20250801083131.82915-7-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>