[source] imx6: Add ds1307 RTC to kernel for working hctosys

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/5481ce9a1157a43d8b2c963e03fb243e70974361

commit 5481ce9a1157a43d8b2c963e03fb243e70974361
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Tue Oct 18 23:26:59 2016 +0200

    imx6: Add ds1307 RTC to kernel for working hctosys
    
    Otherwise if we use ds1307 as kernel module, hctosys fails as ds1307 is
    being initialized later then hctosys:
    
     [    2.427349] hctosys: unable to open rtc device (rtc0)
     [    3.714263] snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered 20cc000.snvs:snvs-r as rtc1
     [    8.990061] rtc-ds1307 3-006f: rtc core: registered mcp7941x as rtc0
    
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 target/linux/imx6/config-4.4 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/linux/imx6/config-4.4 b/target/linux/imx6/config-4.4
index 8799a95..6d251b8 100644
--- a/target/linux/imx6/config-4.4
+++ b/target/linux/imx6/config-4.4
@@ -163,6 +163,7 @@ CONFIG_GENERIC_STRNLEN_USER=y
 # CONFIG_GIANFAR is not set
 CONFIG_GLOB=y
 CONFIG_GPIOLIB=y
+CONFIG_GPIOLIB_IRQCHIP=y
 CONFIG_GPIO_DEVRES=y
 CONFIG_GPIO_GENERIC=y
 CONFIG_GPIO_MXC=y
@@ -349,6 +350,7 @@ CONFIG_REGULATOR_PFUZE100=y
 CONFIG_RFS_ACCEL=y
 CONFIG_RPS=y
 CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_DS1307=y
 # CONFIG_RTC_DRV_IMXDI is not set
 # CONFIG_RTC_DRV_MXC is not set
 CONFIG_RWSEM_SPIN_ON_OWNER=y