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>

.checkpatch.conf

@@ -12,3 +12,6 @@
 
 # For min/max
 --ignore MINMAX
+
+# enable more tests
+--strict