soc/amd/picasso: Add support for generating I2S machine device

This change adds support in ACP device driver to generate I2S machine
device (AMDI5682) in SSDT. It expects mainboard to provide chip config
`dmic_select_gpio` that can be passed as `dmic-gpios` in _DSD for the
device.

BUG=b:157603026
TEST=Verified that I2S machine device is correctly generated for
trembyle.

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I22ab53d7d68c6e042e467e598d688e360d28586f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/2252557
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42970
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/amd/picasso/chip.h

@@ -46,6 +46,9 @@ struct soc_amd_picasso_config {
 		uint8_t flags;
 	} irq_override[16];
 
+	/* DMIC select GPIO for I2S machine driver AMDI5682 */
+	struct acpi_gpio dmic_select_gpio;
+
 	/* Options for these are in src/arch/x86/include/acpi/acpi.h */
 	uint8_t  fadt_pm_profile;
 	uint16_t fadt_boot_arch;