Implement clang-tidy fixes

clang-tidy allows the CI robot to check many things via static analysis.

All changes here were made by the clang-tidy robot, and include a number
of modernization fixes.  updating the tidy file will be done at a later
date.

Signed-off-by: Ed Tanous <etanous@nvidia.com>
Change-Id: I98cc4d600a3c589675507958f6d2350b2141216b
diff --git a/pid/ec/pid.cpp b/pid/ec/pid.cpp
index 762513a..ad547d9 100644
--- a/pid/ec/pid.cpp
+++ b/pid/ec/pid.cpp
@@ -34,7 +34,7 @@
     {
         return min;
     }
-    else if (x > max)
+    if (x > max)
     {
         return max;
     }