msm: vidc: ARM: dts: msm: fix non secure CB virtual address pool size

Non secure context bank size should be 2160 MB instead of 640 MB.
hence, correct the non_secure_cb virtual memory pool address range

Change-Id: I51b92e17343efe51364cf686e261ebb980298c2f
Signed-off-by: Mahesh Voorugonda <mvooru@codeaurora.org>