Staging: r8188eu: core: rtw_xmit: Fixed some spelling errors in the comments

Fixed the spelling of "broadcast" and "update" in the comments.

Signed-off-by: Chang Yu <marcus.yu.56@gmail.com>
Link: https://lore.kernel.org/r/8d2f49631551b53ad970c9165cceb845c4d60b75.1655666628.git.marcus.yu.56@gmail.com


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