MFD,mmc: tmio_mmc: make HCLK configurable

The Toshiba parts all have a 24 MHz HCLK, but HTC ASIC3 has a 24.576 MHz HCLK
and AMD Imageon w228x's HCLK is 80 MHz. With this patch, the MFD driver
provides the HCLK frequency to tmio_mmc via mfd_cell->driver_data.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Ian Molton <ian@mnementh.co.uk>
Acked-by: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

include/linux/mfd/tmio.h

@@ -18,6 +18,13 @@
 	writew((val) >> 16, (addr) + 2); \
 	} while (0)
 
+/*
+ * data for the MMC controller
+ */
+struct tmio_mmc_data {
+	unsigned int		hclk;
+};
+
 /*
  * data for the NAND controller
  */