checkpatch: Fix newline detection in error_setg() & friends

Commit 5d596c24's regexp assumes the error message string is the first
argument.  Correct for error_report(), wrong for all the others.
Relax the regexp to match newline in anywhere.  This might cause
additional false positives.

While there, update the list of error_reporting functions.

Cc: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1470224274-31522-3-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>