defconfig: Version tag 8.4 -> 8.6

CoCore-E is still going on.
mxt224e: Optimize the touchboost condition detection
Signed-off-by: cocafe <cocafehj@gmail.com>
fsync: Optimize sysfs interface

To adapt userspace shell scripts.

Signed-off-by: cocafe <cocafehj@gmail.com>
cypress-touchkey: Allow to disable LED in kernel level

Signed-off-by: cocafe <cocafehj@gmail.com>
abb-charger: Fix various bugs

Add notification of VBUS DROP.
Some bad chargers will cause vbus drop then charging current will be dropped.

Signed-off-by: cocafe <cocafehj@gmail.com>
block: Update ROW iosched