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Memory is now able to run up to 800MHz, and has updated performance
levels for the lower rates. Update the driver data accordingly.

As a result of this change, memory will now run at 800MHz whenever
the L2 is running at 1.5GHz, up from 556MHz which was previously
used.

Change-Id: I5b1ed868d4e15bd56562c19fa51020983561323e
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>