ASoC: tas5805m: add missing page switch.

ASoC: tas5805m: add missing page switch.

In tas5805m_refresh, we switch pages to update the DSP volume control,
but we need to switch back to page 0 before trying to alter the
soft-mute control. This latter page-switch was missing.

Fixes: ec45268467f4 ("ASoC: add support for TAS5805M digital amplifier")
Signed-off-by: Daniel Beer <daniel.beer@igorinstitute.com>
Link: https://lore.kernel.org/r/1fea38a71ea6ab0225d19ab28d1fa12828d762d0.1675497326.git.daniel.beer@igorinstitute.com
Signed-off-by: Mark Brown <broonie@kernel.org>