defconfig: arm64: enable sched features for Kona

Enable below sched features to support EAS on Kona:
1. CONFIG_SCHED_WALT=y
2. CONFIG_SCHED_TUNE=y
3. CONFIG_ENERGY_MODEL=y
4. CONFIG_SCHED_CORE_CTL=y

Change-Id: I0dd3d63a1b0eb0a49f5c338fc032ec0e7a01a587
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>