staging: rtl8723bs: remove unused variable 'pregistrypriv'

drivers/staging/rtl8723bs/hal/sdio_halinit.c: In function HalRxAggr8723BSdio:
drivers/staging/rtl8723bs/hal/sdio_halinit.c:547:24: warning: variable pregistrypriv set but not used [-Wunused-but-set-variable]

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200421024145.43576-1-yuehaibing@huawei.com


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