PCI hotplug: cpcihp: fix debug module parameter to be bool

Fix debug variable from module parameter to be really bool to
fix 'warning: return from incompatible pointer type'.
Acked-by: NScott Murray <scott@spiteful.org>
Signed-off-by: NDanny Kukawka <danny.kukawka@bisect.de>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/cpcihp_generic.c

@@ -62,7 +62,7 @@
 #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
 
 /* local variables */
-static int debug;
+static bool debug;
 static char *bridge;
 static u8 bridge_busnr;
 static u8 bridge_slot;