d2: allow ssr

Change-Id: Id629651dfdfbb4247a90a7cc6f0b4e1fcdd2371e
d2: disable SSR ramdumps

They cause a kernel panic. Revisit once the driver is updated and we
hire somebody who can read them.

JIRA: CYAN-3626

Change-Id: Idcc3c182c208f7d5a745d086eff4f63154122ea9