lint/checkpatch: Fix incorrect camelcase detection on numeric constant

This reduce the difference with linux v6.0-rc3.

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I15e1a935665c38b8a2109d412b1d16f935cbb402
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67337
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
diff --git a/util/lint/checkpatch.pl b/util/lint/checkpatch.pl
index 650ddff..ef2faee 100755
--- a/util/lint/checkpatch.pl
+++ b/util/lint/checkpatch.pl
@@ -5326,7 +5326,7 @@
 			    $var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
 #Ignore some three character SI units explicitly, like MiB and KHz
 			    $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
-				while ($var =~ m{($Ident)}g) {
+				while ($var =~ m{\b($Ident)}g) {
 					my $word = $1;
 					next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
 					if ($check) {