scripts: get_abi.pl: extend xref match to other types

Currently, there are "What:" symbols for more than just
/sys.

Extend the regex to also cover configfs, /proc /dev and /kvd
symbols.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/a1c7e2b2c37ed6e111dfc8641deb37ed96375a63.1616668017.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

scripts/get_abi.pl

@@ -285,7 +285,7 @@ sub create_labels {
 # Boundaries are punct characters, spaces and end-of-line
 my $start = qr {(^|\s|\() }x;
 my $bondary = qr { ([,.:;\)\s]|\z) }x;
-my $xref_match = qr { $start(\/sys\/[^,.:;\)\s]+)$bondary }x;
+my $xref_match = qr { $start(\/(sys|config|proc|dev|kvd)\/[^,.:;\)\s]+)$bondary }x;
 my $symbols = qr { ([\x01-\x08\x0e-\x1f\x21-\x2f\x3a-\x40\x7b-\xff]) }x;
 
 sub output_rest {