[openwrt/openwrt] sunxi: enable missing config symbol

[LEDE Commits]

jow pushed a commit to openwrt/openwrt.git, branch master:
https://git.lede-project.org/f66fe0080abe322d949a5b44a47fc36cbb28d9e7

commit f66fe0080abe322d949a5b44a47fc36cbb28d9e7
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Thu Jan 11 03:11:19 2018 +0100

    sunxi: enable missing config symbol
    
    Enable CONFIG_MFD_AXP20X_I2C after the switch to Kernel 4.9, this symbol
    is reportedly required to get USB working on the Banana Pi.
    
    Ref: https://forum.lede-project.org/t/sunxi-kernel-4-9-usb-not-working/10513
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 target/linux/sunxi/config-4.9 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/sunxi/config-4.9 b/target/linux/sunxi/config-4.9
index e961c8a..16b367b 100644
--- a/target/linux/sunxi/config-4.9
+++ b/target/linux/sunxi/config-4.9
@@ -331,6 +331,7 @@ CONFIG_MDIO_SUN4I=y
 CONFIG_MEDIA_SUPPORT=y
 # CONFIG_MFD_AC100 is not set
 CONFIG_MFD_AXP20X=y
+CONFIG_MFD_AXP20X_I2C=y
 CONFIG_MFD_AXP20X_RSB=y
 CONFIG_MFD_CORE=y
 CONFIG_MFD_SUN6I_PRCM=y