powerpc: Remove duplicate debugger hook in machine_check_exception

We are calling debugger_fault_handler twice in machine_check_exception.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/traps.c

@@ -648,8 +648,6 @@ void machine_check_exception(struct pt_regs *regs)
 	if (check_io_access(regs))
 		return;
 
-	if (debugger_fault_handler(regs))
-		return;
 	die("Machine check", regs, SIGBUS);
 
 	/* Must die if the interrupt is not recoverable */