ASoC: JZ4770: Remove accidentally committed debug code

It was committed as part of the switch to regmap.
ASoC: JZ4770: Have codec select REGMAP
regmap: regcache-flat: Implemented sync operation
regmap: regcache-rbtree: Fixed node range check on sync

A node starting before the minimum register is no reason to reject it,
since its end could be in range. The check for the end already exists
two lines lower, so we can just remove the incorrect check.
ASoC: JZ4770: Combine register updates on probe

This reduces the number of writes by two, saving a few milliseconds
(codec writes are pretty slow).
ASoC: JZ4770: Swap left and right channel