hikey_defconfig: Update hikey_defconfig to reccomended configurations

Using the reccomended configuration fragments, this patch
updates the hikey_defconfig file.

Importantly, this disables CONFIG_RT_GROUP_SCHED, which causes
bluetooth problems with sched_setscheduler() failing.

Also it enables CONFIG_EXT4_FS_POSIX_ACL which are now needed
for properly mounting userdata.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: Iad1a14c7f2fc9f6b54c25cb19e31a2672f0bebcc
1 file changed