platform: Add platform subtype for SDM429 + PM660

Add the subtype of SDM429 + PM660 platform.

Change-Id: I7b051186ca6119d9b0000a85b6a35120ae3756d2
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>
diff --git a/platform/msm_shared/smem.h b/platform/msm_shared/smem.h
index 5dfa7c3..1e63629 100644
--- a/platform/msm_shared/smem.h
+++ b/platform/msm_shared/smem.h
@@ -517,6 +517,7 @@
 	HW_PLATFORM_SUBTYPE_SVLTE2A = 3,
 	HW_PLATFORM_SUBTYPE_MTP_WEAR = 5,
 	HW_PLATFORM_SUBTYPE_SGLTE = 6,
+	HW_PLATFORM_SUBTYPE_429W_PM660 = 6,
 	HW_PLATFORM_SUBTYPE_DSDA = 7,
 	HW_PLATFORM_SUBTYPE_DSDA2 = 8,
 	HW_PLATFORM_SUBTYPE_SGLTE2 = 9,