dts: msm_shared: Use QRD variant_id algorithm for device tree selection

QRD msm8226 needs to use platform_version to
distinguish betweeen hardware such as EVT versus
DVT board. Fill in board.target with variant_id
information for QRD device tree match.

Change-Id: Idd5479bb5e5bd5efe27f5527c42eb6c527c360e3
diff --git a/target/msm8226/init.c b/target/msm8226/init.c
index 026aa53..5bb4887 100644
--- a/target/msm8226/init.c
+++ b/target/msm8226/init.c
@@ -190,7 +190,9 @@
 /* Detect the target type */
 void target_detect(struct board_data *board)
 {
-	board->target = LINUX_MACHTYPE_UNKNOWN;
+	/*
+	* already fill the board->target on board.c
+	*/
 }
 
 /* Detect the modem type */