platform: msm_shared: Add socid for sdm450

Add soc id for sdm450.

Change-Id: Ib00ccb610ccd324722853477b8730bdf807abe19
diff --git a/platform/msm_shared/smem.h b/platform/msm_shared/smem.h
index 5919e47..e9e3515 100644
--- a/platform/msm_shared/smem.h
+++ b/platform/msm_shared/smem.h
@@ -463,6 +463,7 @@
 	SDX202 = 333,
 	MSM8909W = 300,
 	APQ8009W = 301,
+	SDM450 = 338,
 	MDM9206 = 322
 };