ARM: dts: msm: increase the CMA size on SA8195 LV LXC GVM

For the case of dual wlan cards on virtual platform, cma
size should be at least 60M.

Change-Id: I55edbbceccef605db6b3209fccd07d7b4a11656a
Signed-off-by: Yimin Peng <yiminp@codeaurora.org>