Coccinelle: misc: Add support for devm variant in all modes

Add missing support for the devm_request_threaded_irq in
the rules of context, report and org modes.

Misc:
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To be consistent with other scripts, change confidence level
of the script to 'Moderate'.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>