defconfig: arm64: disable ENERGY_MODEL for kona

When ENERGY_MODEL is enabled, observing "BUG: sleeping function called
from invalid context" after entering user space. Disable ENERGY_MODEL for
kona for the time being.

Change-Id: Ia8e376d7d19e16bcd0482ae5e677ab6779be1a70
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>