staging: rtl8723bs: core: Correct typos in comments

Correct typos in comments.
Misspellings found using checkpatch.pl.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/20200326123540.12401-1-vkor@vkten.in


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