[source] x86_64: add drivers for Xeon controller hub based GPIO

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/910df3f06cc902ca2cb0ca8e963e9354c930df1a

commit 910df3f06cc902ca2cb0ca8e963e9354c930df1a
Author: Philip Prindeville <philipp at redfish-solutions.com>
AuthorDate: Mon Mar 27 18:25:24 2017 -0600

    x86_64: add drivers for Xeon controller hub based GPIO
    
    These drivers are in many reference-design Xeon, iCore, or
    Atom64 based server boards.
    
    Signed-off-by: Philip Prindeville <philipp at redfish-solutions.com>
---
 target/linux/x86/64/config-default | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/target/linux/x86/64/config-default b/target/linux/x86/64/config-default
index 840371c..1950213 100644
--- a/target/linux/x86/64/config-default
+++ b/target/linux/x86/64/config-default
@@ -136,8 +136,10 @@ CONFIG_GPIOLIB=y
 CONFIG_GPIO_ACPI=y
 # CONFIG_GPIO_AMDPT is not set
 # CONFIG_GPIO_F7188X is not set
-# CONFIG_GPIO_IT87 is not set
-# CONFIG_GPIO_LYNXPOINT is not set
+CONFIG_GPIO_ICH=y
+CONFIG_GPIO_IT87=y
+CONFIG_GPIO_LYNXPOINT=y
+CONFIG_GPIO_SCH=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_HAVE_ACPI_APEI=y
 CONFIG_HAVE_ACPI_APEI_NMI=y