hal: update voice2 pcm device id for APQ target

The pcm device id for voice2 call on APQ target is updated
to match the Voice2 Stub front-end dai sequence in machine
driver.

Change-Id: Id70f2e8ba5aa7762de616cd867a1e1ed60f9195e
diff --git a/hal/msm8974/platform.h b/hal/msm8974/platform.h
index e80d3f1..2bd2170 100644
--- a/hal/msm8974/platform.h
+++ b/hal/msm8974/platform.h
@@ -196,7 +196,7 @@
 #define QCHAT_CALL_PCM_DEVICE 18
 #elif PLATFORM_APQ8084
 #define VOICE_CALL_PCM_DEVICE 20
-#define VOICE2_CALL_PCM_DEVICE 13
+#define VOICE2_CALL_PCM_DEVICE 28
 #define VOLTE_CALL_PCM_DEVICE 21
 #define QCHAT_CALL_PCM_DEVICE 06
 #elif PLATFORM_MSM8610