[IRDA]: Initial support for MCS7780 based dongles

The MosChip MCS7780 chipset is an IrDA USB bridge that
doesn't conform with the IrDA-USB standard and thus needs
its separate driver.
Tested on an actual MCS7780 based dongle.

Original implementation by Brian Pugh <bpugh@cs.pdx.edu>

Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/irda/Makefile b/drivers/net/irda/Makefile
index c1ce239..5be09f1 100644
--- a/drivers/net/irda/Makefile
+++ b/drivers/net/irda/Makefile
@@ -19,6 +19,7 @@
 obj-$(CONFIG_VLSI_FIR)		+= vlsi_ir.o
 obj-$(CONFIG_VIA_FIR)		+= via-ircc.o
 obj-$(CONFIG_PXA_FICP)	        += pxaficp_ir.o
+obj-$(CONFIG_MCS_FIR)	        += mcs7780.o
 # Old dongle drivers for old SIR drivers
 obj-$(CONFIG_ESI_DONGLE_OLD)		+= esi.o
 obj-$(CONFIG_TEKRAM_DONGLE_OLD)	+= tekram.o