[PATCH] checkpatch: Ignore removed lines in license check

[Nabih Estefan <nabihestefan@google.com>]

When running the license check, if we are updating a license it is
possible for the checkpatch script to test against old license lines
instead of newer ones, since the removal lines appear before the
addition lines in a .patch file.

Fix this by skipping over lines that start with "-" in the checkpatch
script.

Signed-off-by: Nabih Estefan <nabihestefan@google.com>
---
 scripts/checkpatch.pl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 833f20f555..c57a423f9f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1813,7 +1813,8 @@ sub process {
 		}
 
 # Check SPDX-License-Identifier references a permitted license
-		if ($rawline =~ m,SPDX-License-Identifier: (.*?)(\*/)?\s*$,) {
+		if (($rawline =~ m,SPDX-License-Identifier: (.*?)(\*/)?\s*$,) &&
+			$rawline !~ /^-/) {
 			$fileinfo->{facts}->{sawspdx} = 1;
 			&checkspdx($realfile, $1);
 		}
-- 
2.51.0.384.g4c02a37b29-goog