serial core: fix new kernel-doc warnings

Fix new kernel-doc warnings in serial_core.[hc] files.

  Warning(include/linux/serial_core.h:485): No description found for parameter 'uport'
  Warning(include/linux/serial_core.h:485): Excess function parameter 'port' description in 'uart_handle_dcd_change'
  Warning(include/linux/serial_core.h:511): No description found for parameter 'uport'
  Warning(include/linux/serial_core.h:511): Excess function parameter 'port' description in 'uart_handle_cts_change'
  Warning(drivers/serial/serial_core.c:2437): No description found for parameter 'uport'
  Warning(drivers/serial/serial_core.c:2437): Excess function parameter 'port' description in 'uart_add_one_port'
  Warning(drivers/serial/serial_core.c:2509): No description found for parameter 'uport'
  Warning(drivers/serial/serial_core.c:2509): Excess function parameter 'port' description in 'uart_remove_one_port'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index d58e460..fe661af 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -477,7 +477,7 @@
 
 /**
  *	uart_handle_dcd_change - handle a change of carrier detect state
- *	@port: uart_port structure for the open port
+ *	@uport: uart_port structure for the open port
  *	@status: new carrier detect status, nonzero if active
  */
 static inline void
@@ -503,7 +503,7 @@
 
 /**
  *	uart_handle_cts_change - handle a change of clear-to-send state
- *	@port: uart_port structure for the open port
+ *	@uport: uart_port structure for the open port
  *	@status: new clear to send status, nonzero if active
  */
 static inline void