[media] ir: IR_RX51 only works on OMAP2

This driver can be enabled on OMAP1 at the moment, which breaks
allyesconfig for that platform. Let's mark it OMAP2PLUS-only
in Kconfig, since that is the only thing it builds on.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Timo Kokkonen <timo.t.kokkonen@iki.fi>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/rc/Kconfig

@@ -291,7 +291,7 @@ config IR_TTUSBIR
 
 config IR_RX51
 	tristate "Nokia N900 IR transmitter diode"
-	depends on OMAP_DM_TIMER && LIRC && !ARCH_MULTIPLATFORM
+	depends on OMAP_DM_TIMER && ARCH_OMAP2PLUS && LIRC && !ARCH_MULTIPLATFORM
 	---help---
 	   Say Y or M here if you want to enable support for the IR
 	   transmitter diode built in the Nokia N900 (RX51) device.