defconfig: gen3auto: Enable configs for ramdump support

Enable kernel configs needed to suppot ramdump on gen3auto,
these drivers help to capture necessary debug information
in DDR and IMEM when the system crashes either after a panic
or due to any system lockup.

Change-Id: Ie4d2b0cafba363703fe9cac03e6255df3e09cd7e
Signed-off-by: Vivek Kumar <vivekuma@codeaurora.org>
Signed-off-by: Shreyas K K <shrekk@codeaurora.org>