sched/fair: Remove unused 'curr' parameter from wakeup_gran

The first parameter of wakeup_gran(), 'curr', is unnecessary now.

Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: huawei.libin@huawei.com
Cc: xiexiuqi@huawei.com
Link: http://lkml.kernel.org/r/1512653443-179848-1-git-send-email-cj.chengjian@huawei.com


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