Also handle instruction traps. We might hit these when the page we are

executing is being promoted to a superpage.

Obtained from:	ABT Systems Ltd
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation

sys/arm64/arm64/trap.c

@@ -285,6 +285,7 @@ do_el1h_sync(struct trapframe *frame)
 		print_registers(frame);
 		printf(" esr:         %.8lx\n", esr);
 		panic("VFP exception in the kernel");
+	case EXCP_INSN_ABORT:
 	case EXCP_DATA_ABORT:
 		far = READ_SPECIALREG(far_el1);
 		intr_enable();