Update the device node to check for MDM systems

To identify the target as MDM, we need to check for "/target"
node mdm targets instead of "/dev/mdm".

Change-Id: Ibb53acfd06a0a586f2cdca784f475d0a45718581
CRs-Fixed: 1101185
diff --git a/utils/loc_target.cpp b/utils/loc_target.cpp
index 1016861..53a8985 100644
--- a/utils/loc_target.cpp
+++ b/utils/loc_target.cpp
@@ -198,7 +198,7 @@
     static const char hw_platform_dep[]  =
         "/sys/devices/system/soc/soc0/hw_platform";
     static const char id_dep[]           = "/sys/devices/system/soc/soc0/id";
-    static const char mdm[]              = "/dev/mdm"; // No such file or directory
+    static const char mdm[]              = "/target"; // mdm target we are using
 
     char rd_hw_platform[LINE_LEN];
     char rd_id[LINE_LEN];