cpu: Add Units to cpu stats

Change-Id: I387b2e9f6ecf62757242056f732bd443c457ebea
Signed-off-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/39095
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>

src/cpu/o3/commit.hh

@@ -512,7 +512,7 @@ class DefaultCommit
         /** Total number of committed branches. */
         Stats::Vector branches;
         /** Total number of vector instructions */
-        Stats::Vector vector;
+        Stats::Vector vectorInstructions;
         /** Total number of floating point instructions */
         Stats::Vector floating;
         /** Total number of integer instructions */