soundwire: bus: set initial value to port_status

port_status[port_num] are assigned for each port_num in some if
conditions. So some of the port_status may not be initialized.

Signed-off-by: Bard Liao <[e-mail]>
Reviewed-by: Pierre-Louis Bossart <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/soundwire/bus.c

···
 static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 {
 	struct sdw_slave_intr_status slave_intr;
-	u8 clear = 0, bit, port_status[15];
+	u8 clear = 0, bit, port_status[15] = {0};
 	int port_num, stat, ret, count = 0;
 	unsigned long port;
 	bool slave_notify = false;