uwb: add the umc bus

The UMC bus is used for the capabilities exposed by a UWB Multi-interface
Controller as described in the WHCI specification.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/drivers/uwb/Makefile b/drivers/uwb/Makefile
index 9a67be5..41c9fca 100644
--- a/drivers/uwb/Makefile
+++ b/drivers/uwb/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_UWB)		+= uwb.o
+obj-$(CONFIG_UWB_WHCI)		+= umc.o
 
 uwb-objs :=		\
 	address.o	\
@@ -18,3 +19,8 @@
 	scan.o		\
 	uwb-debug.o	\
 	uwbd.o
+
+umc-objs :=		\
+	umc-bus.o	\
+	umc-dev.o	\
+	umc-drv.o