[ARM] 3983/2: remove unused argument to __bug()

It appears that include/asm-arm/bug.h requires include/linux/stddef.h
for the definition of NULL. It seems that stddef.h was always included
indirectly in most cases, and that issue was properly fixed a while ago.

Then commit 5047f09b56d0bc3c21aec9cb16de60283da645c6 incorrectly reverted
change from commit ff10952a547dad934d9ed9afc5cf579ed1ccb53a (bad dwmw2)
and the problem recently resurfaced.

Because the third argument to __bug() is never used anyway, RMK suggested
getting rid of it entirely instead of readding #include <linux/stddef.h>
which this patch does.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/bug.h b/include/asm-arm/bug.h
index 0e36fd5..7b62351 100644
--- a/include/asm-arm/bug.h
+++ b/include/asm-arm/bug.h
@@ -4,10 +4,10 @@
 
 #ifdef CONFIG_BUG
 #ifdef CONFIG_DEBUG_BUGVERBOSE
-extern void __bug(const char *file, int line, void *data) __attribute__((noreturn));
+extern void __bug(const char *file, int line) __attribute__((noreturn));
 
 /* give file/line information */
-#define BUG()		__bug(__FILE__, __LINE__, NULL)
+#define BUG()		__bug(__FILE__, __LINE__)
 
 #else