scsi: qla2xxx: Improve firmware dump data capture

Capture as much firmware dump data as possible. Save the mailbox
registers at start-of-day, before firmware execution, so they are
available in the dump, and allocate a guestimate dump buffer early
during driver load to capture failures that happen before the final
dump buffer is sized.

Make template entry processing more robust: skip over any entry that
fails to capture and continue with the next one, and skip entries that
time out instead of aborting the whole dump. Notify udev once sysfs
nodes are available in case a dump was captured before they existed.

Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://patch.msgid.link/20260730155838.2119230-3-njavali@marvell.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>

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