tools: enable more checkpatch tests by default

without this, patches don't get checked for proper alignment,
and e.g., for spaces after a cast and/or before a semicolon.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/.checkpatch.conf b/.checkpatch.conf
index 977db9e..38386b3 100644
--- a/.checkpatch.conf
+++ b/.checkpatch.conf
@@ -12,3 +12,6 @@
 
 # For min/max
 --ignore MINMAX
+
+# enable more tests
+--strict