staging: rtl8723bs: hal: Correct misspelled symbolic name

Correct misspelled symbolic name.
Misspelling found using checkpatch.pl.

Signed-off-by: R Veera Kumar <vkor@vkten.in>
Link: https://lore.kernel.org/r/b893adc31b71722df63d0756f0d360e27f896e51.1586187304.git.vkor@vkten.in


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