Staging: rtl8723bs: fix spaces in rtw_cmd.c

Staging: rtl8723bs: fix spaces in rtw_cmd.c

This commit fixes the following checkpatch.pl errors:

    ERROR:POINTER_LOCATION: "foo * bar" should be "foo *bar"
    #206: FILE: ./core/rtw_cmd.c:206:
    +static void c2h_wk_callback(struct work_struct * work);

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marco Cesati <marcocesati@gmail.com>
Link: https://lore.kernel.org/r/20210315170618.2566-2-marcocesati@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>