arm/dt: 8610: reduce the memory reservation for display to 3MB

8x10 will only need to support WVGA panels, thus reducing the memory
reservation for display to 3MB.

Change-Id: I0a7dbeeba038f160ac37dc983a45101ae766a7bd
Signed-off-by: Xiaoming Zhou <zhoux@codeaurora.org>
1 file changed