powerpc: Enable GENERIC_HARDIRQS_NO_DEPRECATED.

Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/Kconfig

@@ -134,6 +134,7 @@ config PPC
 	select HAVE_GENERIC_HARDIRQS
 	select HAVE_SPARSE_IRQ
 	select IRQ_PER_CPU
+	select GENERIC_HARDIRQS_NO_DEPRECATED
 
 config EARLY_PRINTK
 	bool