ASoC: fsl_xcvr: Add suspend and resume support

ASoC: fsl_xcvr: Add suspend and resume support

Use regcache_sync() to recover the registers of controller,
PHY and PLL after suspend and resume.
In order to recover the registers need to avoid use the
*_SET, *_CLR and *_TOG registers.

Recovery of the registers should be done before loading
XCVR firmware otherwise some registers set by firmware
are overwritten. Besides only in eARC mode is it necessary
to load XCVR firmware.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Link: https://patch.msgid.link/20241127030035.649219-3-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>