[PATCH] serial: serial_txx9 driver update

Update the serial_txx9 driver.

 * More strict check in verify_port.  Cleanup.
 * Do not insert a char caused previous overrun.
 * Fix some spin_locks.
 * Do not call uart_add_one_port for absent ports.

Also, this patch removes a BROKEN tag from Kconfig.  This driver has been
marked as BROKEN by removal of uart_register_port, but it has been solved
already on Sep 2005.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 89e5413..c66ef96 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -866,7 +866,7 @@
 
 config SERIAL_TXX9
 	bool "TMPTX39XX/49XX SIO support"
-	depends HAS_TXX9_SERIAL && BROKEN
+	depends HAS_TXX9_SERIAL
 	select SERIAL_CORE
 	default y