build: checkpatch limit line length to 100 chars

The default is 100 chars.

Signed-off-by: Daniel Wagner <wagi@kernel.org>

Author: igaw

.checkpatch.conf

@@ -4,7 +4,7 @@
 # This isn't actually a Linux kernel tree
 --no-tree
 
---max-line-length=120
+--max-line-length=100
 
 --ignore EMAIL_SUBJECT