ARM: dts: msm: Add vm-linux as chain partition for sm8150

Add support for vm-linux as chain partition from device tree.
Set Status="" to avoid mounting at init

Change-Id: I13fa761019ba7d9613d8d1c5741c0904bb85ad7e
Signed-off-by: Vivek Tryambake <vtryamba@codeaurora.org>
Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
Signed-off-by: Niranjan Reddy Dumbala <dnreddy@codeaurora.org>