i2c: imx: remove cpu_is_xxx by using platform_device_id

i2c: imx: remove cpu_is_xxx by using platform_device_id

This is some amount of work left/forgot from device tree conversion.
Instead of checking cpu_is_xxx to determine the controller type, the
driver should use platform_device_id, which should match the device
tree compatible string.

The patch changes the driver to use platform_device_id rather than
cpu_is_xxx to determine the controller type/version.  It also updates
the platform code and device tree source accordingly.

As the result, mach/hardware.h inclusion gets removed from the driver.

Signed-off-by: Shawn Guo <[email protected]>
Acked-by: Sascha Hauer <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Cc: Wolfram Sang <[email protected]>
Cc: [email protected]