[PATCH] cmd: boot: Update reset usage message

[Wolfgang Denk]

Dear Michal,

In message <82e0d7efdbd9f8c62f46c7e1a8913ffa52de5a1e.1628676265.git.michal.simek at xilinx.com> you wrote:
> The commit 573a3811edc8 ("sysreset: psci: support system reset in a generic
> way with PSCI") has added support for warm reset via PSCI but this hasn't
> been reflected in usage message and user has to look at the code how to run
> it. That's why update usage text to make this clear.
>
> Here is full help with updated usage:
> ZynqMP> help reset
> reset - Perform RESET of the CPU
>
> Usage:
> reset - cold boot without level specifier
> reset -w - warm reset if implemented

In case of the hard (cold) reset - is it really only a reset of the
CPU, or of the whole board hardware?

Best regards,

Wolfgang Denk

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