ARM: dts: msm: Change modem carveout size for apq8016

apq8016 variant (of msm8916) includes msm8916 memory
layout for its usage. However memory layout for apq8016
defines modem carveout region of size 43MB. Accordingly
override the corresponding modem size for all apq8016
platforms.

Change-Id: Ibd18f95f61f9722f1f3b3e6049529f62bb2db61b
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>