MFD: mcp/ucb1x00: separate ucb1x00 driver data from the MCP data

Patch taken from 5dd7bf59e0 (ARM: sa11x0: Implement autoloading of codec
and codec pdata for mcp bus.) by Jochen Friedrich <jochen@scram.de>.

This adds just the codec data part of the patch.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/linux/mfd/ucb1x00.h b/include/linux/mfd/ucb1x00.h
index 4321f04..731b23a 100644
--- a/include/linux/mfd/ucb1x00.h
+++ b/include/linux/mfd/ucb1x00.h
@@ -104,6 +104,9 @@
 #define UCB_MODE_DYN_VFLAG_ENA	(1 << 12)
 #define UCB_MODE_AUD_OFF_CAN	(1 << 13)
 
+struct ucb1x00_plat_data {
+	int			gpio_base;
+};
 
 struct ucb1x00_irq {
 	void *devid;