dts: change CMA layout [1/1]

dts: change CMA layout [1/1]

PD#SWPL-1909

Problem:
On 32bit kernel, codec cma is located in normal zone by
"alloc-ranges" parameter with large size. This takse up
memory space for kernel and drivers. Sometimes we can see
memory allocation fail log but there are still enought
free pages. But most of these pages are CMA pages.

Solution:
Move codec cma location to high memzone. On 32bit, low
768MB memory is normal zone.
This change also correct first 1MB memory lost problem
for chips later than TXLX

Verify:
P212

Change-Id: I4592d34d08ee4dbb6700bbbfc4e0fadaceab0310
Signed-off-by: tao zeng <tao.zeng@amlogic.com>