Add nodes for devices used by PM code (mpu, dsp, iva).

Add a cpus node as well as recommended in the DT spec.

Remove mpu, dsp, iva devices init if is populated.
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Cc: Kevin Hilman <khilman@ti.com>

Add initial OMAP3 soc file with empty ocp bus.

Based on initial patch from Manju:
http://www.spinics.net/lists/linux-omap/msg55830.htmlSigned-off-by: NBenoit Cousson <b-cousson@ti.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Cc: G, Manjunath Kondaiah <manjugk@ti.com>