ARM: l2c: add helper for L2 cache controller DT IDs
ARM: l2c: add helper for L2 cache controller DT IDs

Make it easier to declare L2 cache controller DT IDs by using a macro.

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

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