genirq: Protect tglx from tripping over his own feet

The irq_desc.status field will either go away or renamed to
settings. Anyway we need to maintain compatibility to avoid breaking
the world and some more. While moving bits into the core, I need to
avoid that I use any of the still existing IRQ_ bits in the core code
by typos. So that file will hold the inline wrappers and some nasty
CPP tricks to break the build when typoed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/internals.h

@@ -13,6 +13,8 @@
 # define IRQ_BITMAP_BITS	NR_IRQS
 #endif
 
+#include "settings.h"
+
 #define istate core_internal_state__do_not_mess_with_it
 
 extern int noirqdebug;