ARM: dts: msm: add dt nodes for sde limits for atoll target

Add dt node for sde limits for atoll target. The
properties include sde sspp linewidth node and
sde bw limit node. These values are used to
denote the maximum possible value for each usecase.

Change-Id: I29648afacd40bc6961ada093f2b2d5b7d6866d4b
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>