kernel-doc: fix kernel-doc warnings in sched

kernel-doc: fix kernel-doc warnings in sched

Fix new kernel-doc notation warnings:

Warning(include/linux/sched.h:2094): No description found for parameter 'p'
Warning(include/linux/sched.h:2094): Excess function parameter 'tsk' description in 'is_idle_task'
Warning(kernel/sched/cpupri.c:139): No description found for parameter 'newpri'
Warning(kernel/sched/cpupri.c:139): Excess function parameter 'pri' description in 'cpupri_set'
Warning(kernel/sched/cpupri.c:208): Excess function parameter 'bootmem' description in 'cpupri_init'

Signed-off-by: Randy Dunlap <[email protected]>
Cc:	Ingo Molnar <[email protected]>
Cc:	Peter Zijlstra <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>