platform: msm8952: Add function to detect 8937

add function to detect 8937 platform.

Change-Id: I562c61274afd421b242fc917cfa084c0dfdd73f0
diff --git a/include/platform.h b/include/platform.h
index 790b132..6e29eaf 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -65,6 +65,7 @@
 int platform_is_msm8939();
 int platform_is_msm8909();
 int platform_is_msm8992();
+int platform_is_msm8937();
 int platform_is_msm8956();
 int boot_device_mask(int);
 uint32_t platform_detect_panel();