hal: Add tx pcm device id for speaker protection usecase

Add tx pcm device id for speaker protection usecase on
8996 target.

Change-Id: Id1998884a924bab7787f13b8877f367254d313c2
diff --git a/hal/msm8974/platform.h b/hal/msm8974/platform.h
index 4b90f8b..14ae2a7 100644
--- a/hal/msm8974/platform.h
+++ b/hal/msm8974/platform.h
@@ -227,6 +227,8 @@
 #define SPKR_PROT_CALIB_RX_PCM_DEVICE 5
 #ifdef PLATFORM_APQ8084
 #define SPKR_PROT_CALIB_TX_PCM_DEVICE 35
+#elif PLATFORM_MSM8996
+#define SPKR_PROT_CALIB_TX_PCM_DEVICE 42
 #else
 #define SPKR_PROT_CALIB_TX_PCM_DEVICE 25
 #endif