staging: rtl8723bs: Correct misspelt symbolic names

Correct misspelt symbolic names.
Misspelling found using checkpatch.pl.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/abe807c11a5fda479ed6079a11d528989fe7b63e.1586187304.git.vkor@vkten.in


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