[IA64] Add CONFIG_STACKTRACE_SUPPORT

Several Linux features are dependent on stack trace support. Add
it so they can be enabled.

Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ba22849..e93f44e 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -62,6 +62,9 @@
 config SWIOTLB
        bool
 
+config STACKTRACE_SUPPORT
+	def_bool y
+
 config GENERIC_LOCKBREAK
 	def_bool n