staging: rtl8723bs: core: Fix incorrect type in assignment

Fix sparse warnings: incorrect type in assignment (different base types).

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210728091117.6235-1-fmdefrancesco@gmail.com


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