dt-bindings: remoteproc: k3-r5f: Split up memory regions

dt-bindings: remoteproc: k3-r5f: Split up memory regions

Split up the region reserved for the firmware image in more specific
sections to expose the full fixed layout. Especially the LPM metadata
section is important for bootloaders as it contains information about
how to exit IO+DDR. This is read by the bootloader but is written by the
firmware.

Signed-off-by: Markus Schneider-Pargmann (TI) <msp@baylibre.com>
Link: https://lore.kernel.org/r/20260318-topic-am62a-ioddr-dt-v6-19-v3-1-c41473cb23c3@baylibre.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>