.checkpatch.conf: Ignore CORRUPTED_PATCH lint

This lint makes lines like the following (trap_handler.c:30)
uncommitable:

	printk(BIOS_DEBUG, "Getting hart id...\n");

The significant part of the line seems to be `\n")`.

Change-Id: Id854ebcef11d8188aea707b8f3e988c704721bf5
Reported-by: Maximilian Schander <maxschander@googlemail.com>
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/22202
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Maximilian Schander <maxschander@googlemail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

.checkpatch.conf

@@ -16,6 +16,7 @@
 --ignore VOLATILE
 --ignore CONFIG_DESCRIPTION
 --ignore MISSING_SPACE
+--ignore CORRUPTED_PATCH
 
 # FILE_PATH_CHANGES seems to not be working correctly. It will
 # choke on added / deleted files even if the MAINTAINERS file