core: pta: versal: Add loader PTA

Simple PTA allowing to dynamically load subsystem PDI files into the Versal
device, using the versal_pm.c driver, which is in turn using the PLM
XilLoader module, A

core: pta: versal: Add loader PTA

Simple PTA allowing to dynamically load subsystem PDI files into the Versal
device, using the versal_pm.c driver, which is in turn using the PLM
XilLoader module, API id 0x0701 (LOAD_SUBSYSTEM_PDI).

Largely based on previous work by
Jeremie Corbier <jeremie.corbier@provenrun.com>.

Signed-off-by: Joachim Foerster <joachim.foerster@missinglinkelectronics.com>
Reviewed-by: Nathan Menhorn <nathan.menhorn@amd.com>
Tested-by: Nathan Menhorn <nathan.menhorn@amd.com>
Reviewed-by: Sean McGinn <sean.mcginn@amd.com>
Reviewed-by: Lucas Kiker <lucas.kiker@amd.com>
Reviewed-by: Sindhu Raveendra <Sindhu.Raveendra@amd.com>
Reviewed-by: Clemens Nasenberg <clemens.nasenberg@amd.com>
Reviewed-by: Jorge Ramirez-Ortiz <jorge.ramirez@oss.qualcomm.com>

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