serial: use SGI_HAS_ZILOG for IP22_ZILOG depends

- Use SGI_HAS_ZILOG for IP22_ZILOG depends
- remove IP22 from description, because the driver works on more than
  IP22 SGI machines

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/serial/Kconfig

@@ -877,15 +877,15 @@ config SERIAL_SUNHV
 	  systems.  Say Y if you want to be able to use this device.
 
 config SERIAL_IP22_ZILOG
-	tristate "IP22 Zilog8530 serial support"
-	depends on SGI_IP22
+	tristate "SGI Zilog8530 serial support"
+	depends on SGI_HAS_ZILOG
 	select SERIAL_CORE
 	help
-	  This driver supports the Zilog8530 serial ports found on SGI IP22
+	  This driver supports the Zilog8530 serial ports found on SGI
 	  systems.  Say Y or M if you want to be able to these serial ports.
 
 config SERIAL_IP22_ZILOG_CONSOLE
-	bool "Console on IP22 Zilog8530 serial port"
+	bool "Console on SGI Zilog8530 serial port"
 	depends on SERIAL_IP22_ZILOG=y
 	select SERIAL_CORE_CONSOLE