drivers/soundwire/alc711: Support clock stop flag from devicetree

Allow overriding the default value (true) via devicetree configuration.
If disable_clkstop_sm_support is set in the devicetree,
the corresponding field in alc711_slave is set to false.

BUG=b:417133565, b:420516709
TEST=Verified build and boot with ALC721 and ALC722.
Headphone path switches successfully via audio jack event.
Confirmed SSDT dump at PCI0.HDAS.SNDW.
Package (0x02)
{
    "mipi-sdw-simplified-clockstopprepare-sm-supported",
    Zero
},

Change-Id: If958cd0c2136e4dd3f60cb9203d9394913d3f66e
Signed-off-by: Ian Feng <ian_feng@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88586
Reviewed-by: Mac Chiang <mac.chiang@intel.com>
Reviewed-by: Simon Yang <simon1.yang@intel.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/soundwire/alc711/alc711.c

@@ -131,6 +131,10 @@ static void soundwire_alc711_fill_ssdt(const struct device *dev)
 		/* Currently only 1 audio mode is supported. */
 		memcpy(&alc711_audio_mode, &config->audio_mode, sizeof(struct soundwire_audio_mode));
 
+	/* Override the default (true) if disable_clkstop_sm_support is set in the devicetree. */
+	if (config->disable_clkstop_sm_support)
+		alc711_slave.simplified_clockstopprepare_sm_supported = false;
+
 	dsd = acpi_dp_new_table("_DSD");
 	soundwire_gen_codec(dsd, &alc711_codec, NULL);
 	acpi_dp_write(dsd);

src/drivers/soundwire/alc711/chip.h

@@ -7,6 +7,7 @@
 #include <mipi/ids.h>
 
 struct drivers_soundwire_alc711_config {
+	bool disable_clkstop_sm_support;
 	const char *name;
 	const char *desc;
 	struct soundwire_address alc711_address;