ARM: dts: add system fstab node to SDW2700 dts

Add system fstab node to SDW2700 dts.This node
is removed for System-As-Root feature on Android P.

Change-Id: Ifc9d804e3aaca771e21052d5abe9fafe2ffcaac4
Signed-off-by: Baochu Xu <bxu@codeaurora.org>
1 file changed