defconfig: msmskunk: Enable early random driver

Stack canary relies on getting early random values. However, the
software random number generator is initialized relatively late in the
boot process making the stack canary very predictable.
Enable the hardware supported random number generator to provide entropy
early in the boot process.

Change-Id: Ia7c183242fcb6fab72905573960776c94d59e343
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>