Don't pass the kernel_pmap to pmap_fault_fixup() if the fault comes from

kernel mode, always use the curthread pmap instead. There are valid cases
were we can fault on a user address from the kernel without pcb_onfault
being set.

Approved by:	re (blanket)

sys/arm/arm/trap.c

@@ -406,8 +406,8 @@ data_abort_handler(trapframe_t *tf)
 #ifdef DEBUG
 	last_fault_code = fsr;
 #endif
-	if (pmap_fault_fixup(user ? vmspace_pmap(td->td_proc->p_vmspace) :
-	    kernel_pmap, va, ftype, user)) {
+	if (pmap_fault_fixup(vmspace_pmap(td->td_proc->p_vmspace), va, ftype,
+	    user)) {
 		goto out;
 	}