defconfig: 8084: Enable Interactive governor

This patch enables Interactive governor in below defconfig.
 *apq8084_defconfig
 *apq8084-perf_defconfig

 This will make interactive govenor as available option to
 choose from the list of governors.

Change-Id: If770e48e16ec999140f767409adc5d043ae4c751
Signed-off-by: Girish S Ghongdemath <girishsg@codeaurora.org>