i3c: master: Free the old_dyn_addr when reattach.

This patch is used to free the old_dyn_addr when the caller want to
reattach the device to the different dynamic address. If the
old_dyn_addr is 0 the function will treat it as no old_dyn_addr is
reserved on the bus. Without the patch, when the driver reattach the i3c
device after setnewda the old_dyn_addr will be permanently occupied.
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20220926105145.8145-1-billy_tsai@aspeedtech.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/i3c/master.c

@@ -1379,6 +1379,9 @@ static int i3c_master_reattach_i3c_dev(struct i3c_dev_desc *dev,
 		i3c_bus_set_addr_slot_status(&master->bus,
 					     dev->info.dyn_addr,
 					     I3C_ADDR_SLOT_I3C_DEV);
+		if (old_dyn_addr)
+			i3c_bus_set_addr_slot_status(&master->bus, old_dyn_addr,
+						     I3C_ADDR_SLOT_FREE);
 	}
 
 	if (master->ops->reattach_i3c_dev) {