firmware: qcom: scm: add support for SHM bridge memory carveout

firmware: qcom: scm: add support for SHM bridge memory carveout

Parse the "memory-region" property and - if present - use it to assign
the dedicated reserved memory to the underlying DMA callbacks which will
then allocate memory for the SCM calls from it.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Elliot Berman <quic_eberman@quicinc.com>
Link: https://lore.kernel.org/r/20240527-shm-bridge-v10-12-ce7afaa58d3a@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>