Setting ACP ACLK as clock source when ACP enters D0 state causing
firmware load failure, as per design clock source should be internal
clock.

Remove acp_clkmux_sel field so that ACP will use internal clock
source when ACP enters into D0 state.

Fixes: d0dab6b7 ("ASoC: SOF: amd: Add sof support for vangogh platform")
Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@amd.com>
Link: https://patch.msgid.link/20240718062004.581685-1-venkataprasad.potturu@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>