[IA64] fixes configs and add default config for ia64 xen domU

This patch fixes xen related Kconfigs and add default config
file for ia64 xen domU.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <aegl@agluck-desktop.(none)>
diff --git a/arch/ia64/xen/Kconfig b/arch/ia64/xen/Kconfig
index f1683a2..515e082 100644
--- a/arch/ia64/xen/Kconfig
+++ b/arch/ia64/xen/Kconfig
@@ -8,8 +8,7 @@
 	depends on PARAVIRT && MCKINLEY && IA64_PAGE_SIZE_16KB && EXPERIMENTAL
 	select XEN_XENCOMM
 	select NO_IDLE_HZ
-
-	# those are required to save/restore.
+	# followings are required to save/restore.
 	select ARCH_SUSPEND_POSSIBLE
 	select SUSPEND
 	select PM_SLEEP