defconfig: fsm9900: Ensure ion is enabled

Recent movement of the ion driver required additional items to be
enabled in the defconfigs for all FSM9900 platforms.

Change-Id: I52c1fc54f9082bf41ae15e33cbe20e91197e2573
Acked-by: Jennifer L. Zenner <jzenner@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>