ARM: dts: imx: Align L2 cache-controller nodename with dtschema
Fix dtschema validator warnings like: l2-cache@a02000: $nodename:0: 'l2-cache@a02000' does not match '^(cache-controller|cpu)(@[0-9a-f,]+)*$' Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Shawn Guo <shawnguo@kernel.org>