[PATCH] ep93xx: move timer defines into core.c and document

[Ryan Mallon]

H Hartley Sweeten wrote:
> ep93xx: move timer defines into core.c and document
> 
> The timer defines are only used in core.c. Move them so
> they will not be globaly exposed.
> 
> While here, add additional defines to document the magic
> numbers used in the registers. Also, add some comments
> for clarification.
> 
> Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>
> Cc: Ryan Mallon <ryan at bluewatersus.com>

Acked-by: Ryan Mallon <ryan at bluewatersys.com>

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