powerpc/eeh: Show hex prefix for PE state sysfs

As Michael suggested, the hex prefix for the output of EEH PE
state sysfs entry (/sys/bus/pci/devices/xxx/eeh_pe_state) is
always informative to users.

Suggested-by: Michael Ellerman <[e-mail]>
Signed-off-by: Gavin Shan <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>

arch/powerpc/kernel/eeh_sysfs.c

···
 		return -ENODEV;
 
 	state = eeh_ops->get_state(edev->pe, NULL);
-	return sprintf(buf, "%08x %08x\n",
+	return sprintf(buf, "%0x08x %0x08x\n",
 		       state, edev->pe->state);
 }