drivers: zynqmp_huk: Add AES eFuse and HUK seed support

When AES eFuse is used to encrypt boot loaders and bitstreams then PUF
functionality is not available for use. When AES eFuse based encryption

drivers: zynqmp_huk: Add AES eFuse and HUK seed support

When AES eFuse is used to encrypt boot loaders and bitstreams then PUF
functionality is not available for use. When AES eFuse based encryption is
in use AES eFuse key becomes device key instead of PUF generated key.

In order to re-plenish additional device specific entropy that PUF would
provide utilize selected set of User programmable eFuses.

Selected user eFuses should be programmed during device manufacturing with
cryptographically good random numbers.

Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>

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