optimize kernel config for kvm_guest

This patch enables few extra kernel options for the kvm_guest subtarget:
- Tickless kernel to avoid timer ticks in idle guests, reduces CPU usage
- Enable paravirtualization steal time support

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32436 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/x86/kvm_guest/config-3.3

@@ -22,6 +22,7 @@ CONFIG_ACPI_PROCESSOR=y
 # CONFIG_ACPI_WMI is not set
 # CONFIG_ASUS_LAPTOP is not set
 CONFIG_CONSOLE_TRANSLATIONS=y
+CONFIG_CPU_IDLE_GOV_MENU=y
 CONFIG_DUMMY_CONSOLE=y
 # CONFIG_EFI is not set
 # CONFIG_HPET is not set
@@ -38,11 +39,12 @@ CONFIG_KVM_GUEST=y
 # CONFIG_LGUEST is not set
 # CONFIG_LGUEST_GUEST is not set
 CONFIG_NLS=y
+CONFIG_NO_HZ=y
 CONFIG_PARAVIRT=y
 CONFIG_PARAVIRT_CLOCK=y
 # CONFIG_PARAVIRT_DEBUG is not set
 CONFIG_PARAVIRT_GUEST=y
-# CONFIG_PARAVIRT_TIME_ACCOUNTING is not set
+CONFIG_PARAVIRT_TIME_ACCOUNTING=y
 CONFIG_PCI_IOAPIC=y
 CONFIG_PCI_LABEL=y
 CONFIG_PCI_MMCONFIG=y