On omap4 we're missing the hsi node with it's related "ti,hwmods"
property that the SoC interconnect code needs.
Note that this will only show up as a bug with "doesn't have
mpu register target base" boot errors when the legacy platform
data is removed.
Let's also update the binding accrodingly while at it.
Cc: Mark Rutland <mark.rutland@arm.com> Cc: Rob Herring <robh+dt@kernel.org> Reviewed-by: Sebastian Reichel <sre@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>