msm8960: Add support to recognize chip variants

Adding MSM8660A, MSM8260A and APQ8060A as valid 8960 variants.

Change-Id: If18d6f2176d25d2216d1ba9ef6634721e271df2a
diff --git a/platform/msm_shared/smem.h b/platform/msm_shared/smem.h
index 9b1415e..8674266 100644
--- a/platform/msm_shared/smem.h
+++ b/platform/msm_shared/smem.h
@@ -191,6 +191,9 @@
     ESM7227AA = 103,
     APQ8064 = 109,
     MSM8930 = 116,
+    MSM8660A = 122,
+    MSM8260A = 123,
+    APQ8060A = 124,
 };
 
 enum platform