[source] kernel: Add intel_idle driver to x86_64 build

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/51130b992734070b419ab047531b2978d67fb706

commit 51130b992734070b419ab047531b2978d67fb706
Author: Michael Marley <michael at michaelmarley.com>
AuthorDate: Sat Mar 11 17:49:26 2017 -0500

    kernel: Add intel_idle driver to x86_64 build
    
    This driver supports CPU-specific idle features on recent Intel
    processors.  It does not conflict with the ACPI idle driver and
    that driver will continue to be used for unsupported and non-Intel
    processors.
    
    Signed-off-by: Michael Marley <michael at michaelmarley.com>
---
 target/linux/x86/64/config-default | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/x86/64/config-default b/target/linux/x86/64/config-default
index 04ed3fa..840371c 100644
--- a/target/linux/x86/64/config-default
+++ b/target/linux/x86/64/config-default
@@ -182,6 +182,7 @@ CONFIG_HYPERV_UTILS=y
 # CONFIG_I7300_IDLE is not set
 # CONFIG_IA32_EMULATION is not set
 CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
+CONFIG_INTEL_IDLE=y
 # CONFIG_INTEL_IPS is not set
 # CONFIG_INTEL_MENLOW is not set
 # CONFIG_INTEL_MIC_BUS is not set