ppc64: mark the "regshere" marker with proper type information.

arch/ppc64/kernel/process.c

@@ -546,7 +546,7 @@ void show_stack(struct task_struct *p, unsigned long *_sp)
 		 * We look for the "regshere" marker in the current frame.
 		 */
 		if (validate_sp(sp, p, sizeof(struct pt_regs) + 400)
-		    && _sp[12] == 0x7265677368657265) {
+		    && _sp[12] == 0x7265677368657265ul) {
 			struct pt_regs *regs = (struct pt_regs *)
 				(sp + STACK_FRAME_OVERHEAD);
 			printk("--- Exception: %lx", regs->trap);

arch/ppc64/xmon/xmon.c

@@ -1402,7 +1402,7 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr,
 		/* Look for "regshere" marker to see if this is
 		   an exception frame. */
 		if (mread(sp + 0x60, &marker, sizeof(unsigned long))
-		    && marker == 0x7265677368657265) {
+		    && marker == 0x7265677368657265ul) {
 			if (mread(sp + 0x70, &regs, sizeof(regs))
 			    != sizeof(regs)) {
 				printf("Couldn't read registers at %lx\n",