usb: typec: tipd: Fail probe when the controller is in BOOT mode

BOOT mode means that the device isn't operational because of missing
firmware, so there's no reason to try to continue in this condition
(probe will fail in a different place anyway).

Aside of that, the warning that used to be emited about "dead-battery
condition" was misleading, as dead-battery condition is a different
thing that's unrelated to operation mode.

Therefore, assume that BOOT mode is not a supported mode of operation.

Signed-off-by: Sebastian Krzyszkowiak <>
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