defconfig: Enable configs for ramdump support on Direwolf

Enable kernel configs needed to suppot ramdump on Direwolf.
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: Ib668a3b28db4ea0ab3579564498c712c2a0abdd7
Signed-off-by: Shreyas K K <shrekk@codeaurora.org>