[ARM] 5278/1: i2c-pxa fast mode support

[ARM] 5278/1: i2c-pxa fast mode support

Add fast_mode option to i2c_pxa_platform_data and use it to set the
ICR_FM bit appropriately when i2c_pxa_reset is called. Parameter
called fast_mode rather than frequency as this driver is also used
for the i2c_pxa_pwr bus which has different normal and fast frequencies.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>