[source] mvebu: enable PCA955x driver for clearfog to enable pcie and usb

[LEDE Commits]

jogo pushed a commit to source.git, branch master:
https://git.lede-project.org/c4f4d65835edc2631e10524e078d73f675e00dca

commit c4f4d65835edc2631e10524e078d73f675e00dca
Author: Jonas Gorski <jonas.gorski at gmail.com>
AuthorDate: Fri Sep 23 14:32:21 2016 +0200

    mvebu: enable PCA955x driver for clearfog to enable pcie and usb
    
    Some of the PCIe and USB signals use a GPIO expander on I2C on ClearFog,
    so enable the driver so that they can be configured to their required
    values.
    
    Signed-off-by: Jonas Gorski <jonas.gorski at gmail.com>
    Acked-by: Felix Fietkau <nbd at nbd.name>
---
 target/linux/mvebu/config-4.4 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/linux/mvebu/config-4.4 b/target/linux/mvebu/config-4.4
index e094185..27d0a0f 100644
--- a/target/linux/mvebu/config-4.4
+++ b/target/linux/mvebu/config-4.4
@@ -181,6 +181,8 @@ CONFIG_GPIOLIB=y
 CONFIG_GPIO_DEVRES=y
 CONFIG_GPIO_MVEBU=y
 CONFIG_GPIO_MVEBU_PWM=y
+CONFIG_GPIO_PCA953X=y
+# CONFIG_GPIO_PCA953X_IRQ is not set
 CONFIG_GPIO_SYSFS=y
 CONFIG_HANDLE_DOMAIN_IRQ=y
 CONFIG_HARDIRQS_SW_RESEND=y