staging: rtl8723bs: remove sdio_drv_priv structure

staging: rtl8723bs: remove sdio_drv_priv structure

The sdio_drv_priv structure is a small wrapper around sdio_driver in
linux/mmc/sdio_func.h with an added drv_registered integer.

drv_registered is never used anywhere in the driver and only assigned to
during the sdio registering and unregistering process. We can safely
remove sdio_drv_priv and use the sdio_driver structure directly.

Signed-off-by: Bryan Brattlof <hello@bryanbrattlof.com>
Link: https://lore.kernel.org/r/20210414173751.317762-1-hello@bryanbrattlof.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>