staging: rtl8723bs: os_dep: added blank line to fix coding style issue

Fixed a coding style issue by adding a blank line after declarations in
sdio_intf.c to fix a checkpatch warning.
Signed-off-by: Ross Schmidt <ross.schm.dev@gmail.com>
Link: https://lore.kernel.org/r/20200902192044.19143-1-ross.schm.dev@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/sdio_intf.c

@@ -131,6 +131,7 @@ static irqreturn_t gpio_hostwakeup_irq_thread(int irq, void *data)
 static u8 gpio_hostwakeup_alloc_irq(struct adapter *padapter)
 {
 	int err;
+
 	if (oob_irq == 0) {
 		DBG_871X("oob_irq ZERO!\n");
 		return _FAIL;