Merge branch 'persistent_storage' into 'master'

Vesta 100, 200 and 300 all use same emmc partition for downloading of big update files

See merge request !3

recipes-support/swupdate/swupdate/create_tmp_swupdate_dir.sh

 #!/bin/sh
 #This scripts creates a /tmp/swupdate folder for updating.
-#If using emmc for rootfs updates then mmcblk1p4 is used as 
+#If using emmc for rootfs updates then mmcblk1p7 is used as 
 #a temporary place to download the update packages
 #as they can exceed the amount of free memory for /tmp
 
-#If vesta-100 or vesta-200 use p7
-grep vesta-[12] /proc/cmdline >> NULL
-
-if [ $? -eq 0 ]; then
-    mmcpart=/dev/mmcblk1p7
-else
-    mmcpart=/dev/mmcblk1p4
-fi
-
+mmcpart=/dev/mmcblk1p7
 
 tmpfolder=/tmp/swu_packages