arm/dt: ion: Add entry for memory hole and relocatable pil heaps

Add the address and size information of the memory corresponding to
the hole, which is to be removed by memblock-remove, in order to get
rid of dependancy with bootloader.

Add the entry for relocatable pil Heaps to be loaded using ion
framework.

Change-Id: Ic498a362958664f1f632bbec849414cce55886f7
Signed-off-by: Hanumant Singh <hanumant@codeaurora.org>
Signed-off-by: Neeti Desai <neetid@codeaurora.org>