When TrustFence encryption is enabled, the TF-A recipe converts the
binary FIP encryption key to a hexadecimal string and passes it to the
TF-A build as ENC_KEY.
hexdump suppresses repeated output by default and emits '*' when it folds
duplicate data. If that happens while converting the key, the generated
ENC_KEY contains the '*' marker instead of the full hex string. The
malformed value then breaks the make command line, and make can interpret
the remaining key fragment as a target, failing for example with:
make ... ENC_KEY=13eb911dfcc316b1b99bbbbf10a7000c3055e863* 166d3c8c9cd6f888b720a9 all
make: *** No rule to make target '166d3c8c9cd6f888b720a9'. Stop.
Use hexdump -v so every byte of the binary key is emitted and ENC_KEY is
always a complete, contiguous hex string.
https://onedigi.atlassian.net/browse/DEL-10115
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
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