clk: lmk04832: add support for digital delay

The digital delay allows outputs to be delayed from 8 to 1023 VCO
cycles. The delay step can be as small as half the period of the clock
distribution path. For example, a 3.2-GHz VCO frequency results in
156.25-ps steps.  The digital delay value takes effect on the clock
output phase after a SYNC event.

This is required to support JESD204B subclass 1.

Signed-off-by: Liam Beguin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>

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