configure HPET_EMULATE_RTC automatically

From: Stefan Richter <stefanr@s5r6.in-berlin.de>
I don't know exactly what this option does...
Andi says it should be automatic rather than exposed as a prompt.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Andi Kleen <ak@suse.de>

---

---
 arch/x86_64/Kconfig |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux/arch/x86_64/Kconfig
===================================================================
--- linux.orig/arch/x86_64/Kconfig
+++ linux/arch/x86_64/Kconfig
@@ -458,8 +458,9 @@ config HPET_TIMER
 	  <http://www.intel.com/hardwaredesign/hpetspec.htm>.
 
 config HPET_EMULATE_RTC
-	bool "Provide RTC interrupt"
+	bool
 	depends on HPET_TIMER && RTC=y
+	default y
 
 # Mark as embedded because too many people got it wrong.
 # The code disables itself when not needed.