linux-phytec-ti

ARM: dts: AM4372: Add PRUSS0 node

The AM437x SoC has a second smaller PRU-ICSS subsystem (PRUSS0)
in addition to the primary PRUSS1 instance. The PRUSS0 has less
DRAM per PRU, and no Shared DRAM among other minor differences.

This PRUSS0 instance has a weird SoC integration. It shares the
same L3 OCP interconnect interface with PRUSS1, and also shares
its reset line and clocks. Any external accesses from PRUSS0
requires the PRUSS1's PRUSS_SYSCFG register to be programmed
properly. That said, it is its own IP instance (a cut-down version),
and so it has been added as an independent node (sibling node to
PRUSS1 node) and a child node of the AM437x PRUSS wrapper node.
This allows the PRUSS0 instance to be enabled/disabled
independently of the PRUSS1 instance.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>