storage-init.sh: Fix /dev/root checking

storage-init.sh considers that /dev/root will be always a symbolic link,
which is not true for some platforms, such as in some NVIDIA devices, where
/dev/root it's just a regular file block device. This commit adds a check
for special block device for /dev/root.

Signed-off-by: Renê de Souza Pinto <rene@renesp.com.br>

pkg/storage-init/storage-init.sh

@@ -276,7 +276,7 @@ for BLK_DEVICE in $BLK_DEVICES; do
 done
 
 #Recording SMART details to a file
-if [ -L /dev/root ] ; then
+if [ -L /dev/root ] || [ -b /dev/root ] ; then
   DEV_TO_CHECK_SMART=/dev/root
 else
   DEV_TO_CHECK_SMART=$(grep -m 1 /persist < /proc/mounts | cut -d ' ' -f 1)