sched/fair: Cleanup: remove duplicate variable declaration

cfs_rq is declared twice, fix it.

Also use 'se' instead of '&p->se'.

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/169201374366727@web6d.yandex.ru


Signed-off-by: Ingo Molnar <mingo@kernel.org>