remoteproc: Add AMD MicroBlaze/V BRAM-based remote processor driver

Add a remoteproc driver for AMD MicroBlaze/V soft-core processor
subsystems instantiated in programmable logic and using dual-port BRAM
for firmware storage and execution.

The driver parses the firmware memory window from the remoteproc device
node's reg property, interprets that address and size in the
processor-local address space, and then uses standard devicetree address
translation through the parent bus ranges property to obtain the
corresponding Linux-visible system physical address.

The resulting translated region is registered as the executable
remoteproc carveout and coredump segment.

The processor is controlled through an active-low reset GPIO and a
subsystem clock. The clock is enabled before reset is released, and the
processor is kept in reset until firmware loading completes.

The firmware-name property is optional, allowing firmware to be assigned
later through the remoteproc framework. Firmware images without a
resource table are also accepted.

Signed-off-by: Ben Levinsky <ben.levinsky@amd.com>
Link: https://lore.kernel.org/r/20260714202441.554065-3-ben.levinsky@amd.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

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