ARM: dts: msm: add mem-offline support for atoll

Add memory offline support in dt that will be used by PASR feature.

Change-Id: Id213b7f3b30a3a708fd8a1568eca254026618c87
Signed-off-by: qqzhou <qqzhou@codeaurora.org>
Signed-off-by: Zhenhua Huang <zhenhuah@codeaurora.org>