ARM: dts: omap4-panda-common: Add CMA pools and enable IPU & DSP

The CMA reserved memory nodes have been added for the IPU and DSP
remoteproc devices on all the OMAP4-based Panda boards. These nodes
are assigned to the respective rproc device nodes, and both the
IPU and DSP remote processors are enabled for all these boards.

The current CMA pools and sizes are defined statically for each device.
The starting addresses are fixed to meet current dependencies on the
remote processor firmwares, and will go away when the remote-side
code has been improved to gather this information runtime during
its initialization.

An associated pair of the rproc node and its CMA node can be disabled
later on if there is no use-case defined to use that remote processor.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>