sh64: Build in support for generic stacktrace ops.

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/kernel/Makefile_64

 extra-y	:= head_64.o init_task.o vmlinux.lds
 
-obj-y	:= debugtraps.o idle.o io.o io_generic.o irq.o machvec.o process_64.o \
-	   ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o \
-	   syscalls_64.o time.o topology.o traps.o traps_64.o unwinder.o
+obj-y	:= debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o	\
+	   machvec.o process_64.o ptrace_64.o setup.o signal_64.o	\
+	   sys_sh.o sys_sh64.o syscalls_64.o time.o topology.o 		\
+	   traps.o traps_64.o unwinder.o
 
 obj-y				+= cpu/
 obj-$(CONFIG_SMP)		+= smp.o