net/irda: sh_sir: Add SuperH IrDA driver

This is very simple IrDA SIR driver for SuperH.
This driver was tested by irdaping/ircp on SH7724 EcoVec24 board

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/irda/Kconfig b/drivers/net/irda/Kconfig
index f763842..af10e97 100644
--- a/drivers/net/irda/Kconfig
+++ b/drivers/net/irda/Kconfig
@@ -64,6 +64,16 @@
 
 comment "Dongle support"
 
+config SH_SIR
+	tristate "SuperH SIR on UART"
+	depends on IRDA && SUPERH && \
+		(CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7723 || \
+		 CPU_SUBTYPE_SH7724)
+	default n
+	help
+	  Say Y here if your want to enable SIR function on SuperH UART
+	  devices.
+
 config DONGLE
 	bool "Serial dongle support"
 	depends on IRTTY_SIR