staging: rtl8723bs: os_dep: Correct typo in comments

Correct typo in two comments.
Misspelling found using checkpatch.pl.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/1ea4ff5dedf35b51afc53866c303b62a66caff7d.1584633953.git.vkor@vkten.in


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