lkl: fix a string format warning

String format %p family expects to be passed void * type.
This commit adds missing explicit type cast.

Signed-off-by: Akira Moroo <retrage01@gmail.com>

Author: retrage

arch/lkl/kernel/misc.c

@@ -15,7 +15,8 @@ void dump_stack(void)
 	while (((long)stack & (THREAD_SIZE - 1)) != 0) {
 		addr = *stack;
 		if (__kernel_text_address(addr)) {
-			pr_info("%p:  [<%08lx>] %pS", stack, addr, addr);
+			pr_info("%p:  [<%08lx>] %pS", stack, addr,
+				(void *)addr);
 			pr_cont("\n");
 		}
 		stack++;