ASoC: ak5558: Add support for ak5552

AK5552 is a 32-bit 2ch ADC and has the same register
map as AK5558.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1617176686-25528-1-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>