sched: do not set softirqs to nice +19

do not set softirqs to nice +19. _If_ for whatever reason
we missed to process some high-prio softirq and woke up
ksoftirqd, we should give it a fair chance to actually
get some work done, even if the system is under load.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/softirq.c

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 0b9886a..73217a9 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -488,7 +488,6 @@
 
 static int ksoftirqd(void * __bind_cpu)
 {
-	set_user_nice(current, 19);
 	current->flags |= PF_NOFREEZE;
 
 	set_current_state(TASK_INTERRUPTIBLE);