ANDROID: Export raise_softirq

Pending softirq won’t block turning off idle tick, so it will take
longer to be handled. This is for power saving purposes but has extra
delay. From above, it needs to export raise_softirq for external module
to speed up the time sensitive event.

Bug: 342105533
Change-Id: Icfe46aeb62b7feea19396a210e930f72f402369c
Signed-off-by: Jacky Liu <qsliu@google.com>
(cherry picked from commit 0935fda826e02c4fc645164d40f186f1bfb21a3f)

kernel/softirq.c

@@ -734,6 +734,7 @@ void raise_softirq(unsigned int nr)
 	raise_softirq_irqoff(nr);
 	local_irq_restore(flags);
 }
+EXPORT_SYMBOL_GPL(raise_softirq);
 
 void __raise_softirq_irqoff(unsigned int nr)
 {