ASoC: sun8i-codec: Round up the LRCK divisor

The codec supports only power-of-two BCLK/LRCK divisors. If either the
slot width or the number of slots is not a power of two, the LRCK
divisor must be rounded up to provide enough space. To do that, use
order_base_2 (instead of ilog2, which rounds down).

Since the rounded divisor is also needed for setting the SYSCLK/BCLK
divisor, return the order base 2 instead of fully calculating the
hardware register encoding.

Acked-by: Maxime Ripard <[email protected]>
Signed-off-by: Samuel Holland <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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