remoteproc updates for v4.20

This contains a series of patches that reworks the memory carveout
handling in remoteproc, in order to allow this to be reused for
statically allocated memory regions to be used for e.g. firmware.

It adds support for audio DSP (both TZ-assisted and non-TZ assisted) and
compute DSP on Qualcomm SDM845, TZ-assisted audio DSP, compute DSP and
WiFi processor on Qualcomm QCS404 and through some renaming of the
drivers cleans up the naming situation.

Finally support for custom coreudmp segment handlers is added and
is used in the Qualcomm modem remoteproc driver to gather memory dumps
of the firmware.
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