[MFD] Add SA11x0 MCP support

This adds support for the MCP interface found on SA11x0 devices.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ff31f28..98bdd6a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -3,3 +3,4 @@
 #
 
 obj-$(CONFIG_MCP)		+= mcp-core.o
+obj-$(CONFIG_MCP_SA11X0)	+= mcp-sa11x0.o