platform: msm_shared: Add support for SBC platform type

Add Single Board Computer platform type.

Change-Id: I92b7f801ab7b65c6f9c028673125841916315375
diff --git a/platform/msm_shared/smem.h b/platform/msm_shared/smem.h
index b9d0e21..daa9b0f 100644
--- a/platform/msm_shared/smem.h
+++ b/platform/msm_shared/smem.h
@@ -366,6 +366,7 @@
 	HW_PLATFORM_RCM = 21,
 	HW_PLATFORM_DMA = 22,
 	HW_PLATFORM_STP = 23,
+	HW_PLATFORM_SBC = 24,
 	HW_PLATFORM_32BITS = 0x7FFFFFFF,
 };