ARM: l2c: highbank: implement new write_sec method
ARM: l2c: highbank: implement new write_sec method

With the write_sec method, we no longer need to override the default L2C
disable method.  This can be handled via the write_sec method instead.

Signed-off-by: Russell King <f6aa0246ff943bfa8602cdf60d40c481b38ed232@arm.linux.org.uk>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs