[PATCH] ep93xx: add keypad core support

[Ryan Mallon]

H Hartley Sweeten wrote:
> Add the core support needed by the ep93xx matrix keypad driver.
> 
> The keypad driver unfortunately was merged early and the core
> support is missing.  The clkdev support has been resolved and
> is now merged.  This adds the platform device to the ep93xx
> core and supplies the functions needed to acquire/free the gpio
> pins and actually enable/disable the controller peripheral.
> 
> Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>
> Cc: Ryan Mallon <ryan at bluewatersys.com>
> 
> ---
> 
> Note: this patch will need to be rebased once a few patches in
> the ARM patch tracker are applied.  Please consider this patch
> for review.

The patch looks okay. Can you do the rebase and repost it please. I want
to at least build test non-trivial patches from now on to avoid silly
build error bugs getting introduced again.

~Ryan

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