power: supply: max17042_battery: Retry failed MAX17055 initialization

MAX17055 initialization can fail on register I/O. Propagate the ModelCfg
Refresh command error and retry MAX17055 failures every 10 seconds so a
transient startup error does not become permanent. Report failures for the
other gauges without changing their one-shot behavior.

Notify consumers whenever initialization succeeds, including on the first
attempt. The core registration notification is deferred and can observe
-EAGAIN while asynchronous gauge initialization is still running, so a new
notification is needed when driver-backed properties become available.

Assisted-by: OpenCode:gpt-5.6-sol
Signed-off-by: Vincent Cloutier <vincent@cloutier.co>
Link: https://patch.msgid.link/20260727011319.621794-7-vincent.cloutier@icloud.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

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