audio: detect_test: add multi-slot frequency detection and IPC4 notification

- Add multi-slot zero-crossing frequency estimation for Slot 0 (Male 120Hz),
  Slot 1 (Female 220Hz), and Slot 2 (Child 350Hz).
- Require 30ms sustained frequency match (consec_match_count >= 3) and energy > 500
  to eliminate transient background room noise triggers.
- Map IPC4 pipeline IDs 101/102/103 to slot IDs 0/1/2.
- Populate IPC4 phrase detection notifications with WOV detector module ID,
  instance ID, and slot ID.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

src/include/ipc4/detect_test.h

@@ -30,6 +30,13 @@ enum ipc4_detect_test_module_config_params {
 	 * Ipc mailbox must contain properly built sof_detect_test_config
 	 * struct.
 	 */
-	IPC4_DETECT_TEST_GET_CONFIG = 3
+	IPC4_DETECT_TEST_GET_CONFIG = 3,
+
+	/*
+	 * Use LARGE_CONFIG_SET to assign this detector's slot index in the
+	 * WOV arbiter (0, 1, or 2).  Payload is a single uint8_t.
+	 * Set to WOV_SLOT_INVALID (0xff) to disable arbiter integration.
+	 */
+	IPC4_DETECT_TEST_SET_WOV_SLOT = 4
 };
 #endif