mb/google/ocelot/var/ocelot: Conditionally init ALC256 HDA using

fw_config

This commit implements `mainboard_is_hda_codec_enabled()` for the
Google Ocelot mainboard variant. This overrides the default weak HDA
common initialization.

Change-Id: I11f9d8ae00d1a3d7f03e068aa3980ecd98a47ecd
Signed-off-by: Avi Uday <aviuday@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88933
Reviewed-by: Pranava Y N <pranavayn@google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/ocelot/variants/ocelot/variant.c

@@ -4,6 +4,7 @@
 #include <ec/google/chromeec/ec.h>
 #include <fsp/api.h>
 #include <fw_config.h>
+#include <intelblocks/hda.h>
 #include <sar.h>
 #include <soc/gpio_soc_defs.h>
 #include <drivers/intel/touch/chip.h>
@@ -71,3 +72,22 @@ bool variant_is_barrel_charger_present(void)
 	else
 		return false;
 }
+
+/*
+ * HDA verb table loading is supported based on the firmware configuration.
+ *
+ * This function determines if the current platform has an HDA codec enabled by
+ * examining the `FW_CONFIG` value. Specifically, it checks if the
+ * `FW_CONFIG` includes the `AUDIO_ALC256_HDA` value, which is used to identify
+ * Fatcat SKUs with HDA codec support.
+ *
+ * Return true if the `FW_CONFIG` indicates HDA support (i.e., contains
+ * `AUDIO_ALC256_HDA`), false otherwise.
+ */
+bool mainboard_is_hda_codec_enabled(void)
+{
+	if (fw_config_probe(FW_CONFIG(AUDIO, AUDIO_ALC256_HDA)))
+		return true;
+
+	return false;
+}