[PATCH] ppc32: open_pic2.c build fix

arch/ppc/syslib/open_pic2.c: In function `init_openpic2_sysfs':
arch/ppc/syslib/open_pic2.c:694: error: `ENODEV' undeclared (first use in this function)
arch/ppc/syslib/open_pic2.c:694: error: (Each undeclared identifier is reported only once
arch/ppc/syslib/open_pic2.c:694: error: for each function it appears in.)

possible fix below.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/syslib/open_pic2.c

@@ -20,6 +20,7 @@
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/sysdev.h>
+#include <linux/errno.h>
 #include <asm/ptrace.h>
 #include <asm/signal.h>
 #include <asm/io.h>