Revert "kernel/sched: Remove dl_boosted flag comment"

This reverts commit a9f94dc4dd which is
commit 0e3872499de1a1230cef5221607d71aa09264bd5 upstream.

It is a comment change for a commit that will be reverted next in the
series that broke the abi, so revert this as well.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I8ee94098946dd322d5dcd05421ca253123677fde

include/linux/sched.h

@@ -538,6 +538,10 @@ struct sched_dl_entity {
 	 * task has to wait for a replenishment to be performed at the
 	 * next firing of dl_timer.
 	 *
+	 * @dl_boosted tells if we are boosted due to DI. If so we are
+	 * outside bandwidth enforcement mechanism (but only until we
+	 * exit the critical section);
+	 *
 	 * @dl_yielded tells if task gave up the CPU before consuming
 	 * all its available runtime during the last job.
 	 *