ARM: dts: msm: Fix address and size width for common cma node for sdx20

"reserved-mem" tuple is set to 1 for "address-cells" and "size-cells".
Fix the CMA region attributes as per the that.

Change-Id: I6db1f50644150dbf92e4c9721334f3a627aeb922
Signed-off-by: Vishwanath Raju K <vishk@codeaurora.org>