arch/score/Kconfig: Remain but disable STACKTRACE_SUPPORT

If enable STACKTRACE_SUPPORT, score has to implement save_stack_trace() too. At present, it does not implement save_stack_trace(). So remain but disable STACKTRACE_SUPPORT, just like um architecture has done.

LD init/built-in.o
kernel/built-in.o: In function `save_trace':
lockdep.c:(.text.save_trace+0x44): undefined reference to save_stack_trace' kernel/built-in.o: In function match_held_lock':
lockdep.c:(.text.match_held_lock+0x78): undefined reference to save_stack_trace' kernel/built-in.o: In function .L1144':
lockdep.c:(.text.lockdep_init_map+0x1a4): undefined reference to save_stack_trace' kernel/built-in.o: In function .L1197':
lockdep.c:(.text.__lock_acquire+0x14c): undefined reference to save_stack_trace' kernel/built-in.o: In function .L1856':
lockdep.c:(.text.__lock_set_class+0x160): undefined reference to save_stack_trace' kernel/built-in.o:(.text.lockdep_reset_lock+0xa0): more undefined references to save_stack_trace' follow
make: *** [vmlinux] Error 1

---
 arch/score/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 4ac8cae..2ba8d05 100644
@@ -76,7 +76,7 @@ config LOCKDEP_SUPPORT
 	def_bool y
 
 config STACKTRACE_SUPPORT
-	def_bool y
+	def_bool n
 
 source "init/Kconfig"
 

1.9.2.459.g68773ac