scripts/checkpatch.pl: remove _deferred and _deferred_once false warning

scripts/checkpatch.pl: remove _deferred and _deferred_once false warning

With commit 98e35f5894cf ("printk: git rid of [sched_delayed] message for
printk_deferred") printk_deferred and printk_deferred_once require
LOGLEVEL in argument, but checkpatch.pl was not fixed and still reports it
as warning:

WARNING: Possible unnecessary KERN_ALERT
printk_deferred(KERN_ALERT "checking deferred
");

As suggested by Andy, made 2 functions from logFunction.

1. logFunction: with all checks
2. logFunctionCore: without printk(?:_ratelimited|_once|_deferred) checking

and call logFunctionCore instead of logFunction for checking of loglevel,
which will exclude checking of printk(?:_ratelimited|_once|_deferred).

This way, there is no need to maintain same stanza at multiple places for
removing printk flavours.

Link: https://lkml.kernel.org/r/20220202103309.1914992-1-maninder1.s@samsung.com
Co-developed-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Jan Kara <jack@suse.cz>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>