defconfig: arm64: Enable app specific setting for MSM8996 on automotive

Enable support for app specific setting on MSM8996. This
is required for providing an interface so that app specific
settings can be applied / cleared.

Change-Id: I2dc533aae99b3898db2d61f99c4c99877eb575d0
Signed-off-by: Zhiqiang Tu <ztu@codeaurora.org>