module_param: make bool parameters really bool (drivers & misc)

module_param(bool) used to counter-intuitively take an int.  In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.

It's time to remove the int/unsigned int option.  For this version
it'll simply give a warning, but it'll break next kernel version.

Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 4abd2bc..51a9727 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -148,7 +148,7 @@
 static struct timer_list xd_watchdog_int;
 
 static volatile u_char xd_error;
-static int nodma = XD_DONT_USE_DMA;
+static bool nodma = XD_DONT_USE_DMA;
 
 static struct request_queue *xd_queue;