common.xml: strip degE7 from MAV_CMD_DO_SET_ROI (mavlink#2421)

it's not transported as degE7 when using COMMAND_LONG

Author: peterbarker

message_definitions/v1.0/common.xml

@@ -1626,8 +1626,8 @@
         <param index="2">Empty</param>
         <param index="3">Empty</param>
         <param index="4">Empty</param>
-        <param index="5" label="Latitude" units="degE7">Latitude of ROI location</param>
-        <param index="6" label="Longitude" units="degE7">Longitude of ROI location</param>
+        <param index="5" label="Latitude">Latitude of ROI location</param>
+        <param index="6" label="Longitude">Longitude of ROI location</param>
         <param index="7" label="Altitude" units="m">Altitude of ROI location</param>
       </entry>
       <entry value="196" name="MAV_CMD_DO_SET_ROI_WPNEXT_OFFSET" hasLocation="false" isDestination="false">