drivers: llcc: Configure cache override registers

Use the llcc compatible string to configure correct set of llcc
override registers.

Change-Id: I29f00a095aeaf3494674c2e2bfae897b2d93756f
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
[rananta@codeaurora.org: Updated register offsets]
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>