defconfig: Disable panic when EDAC encounters single bit errors

Disable kernel panic option when single bit errors are
encountered by the EDAC framework, so that instead, recovery
from these types of errors can be performed.

Change-Id: I886c833dc9b37c9d061a219796c2a22ba41b0c30
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>