drivers: versal: ecc: Separate code using PLM firmware into its own file

In preparation for introducing a driver for Versal NET's PKI Accelerator
block.

Largely based on previous work by
Jeremie Co

drivers: versal: ecc: Separate code using PLM firmware into its own file

In preparation for introducing a driver for Versal NET's PKI Accelerator
block.

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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