ASoC: SOF: amd: Flush cache after ATU_BASE_ADDR_GRP register update

ASoC: SOF: amd: Flush cache after ATU_BASE_ADDR_GRP register update

ACP_SRAM_PTE block has cache that needs to be flushed after every
PTE updates. This patch updates ACPAXI2AXI_ATU_CTRL register to
flush cache after updating PTE with stream physical address.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220304205733.62233-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>