soc: renesas: Enable ARM_ERRATA_814220 for affected Cortex-A7
ARM Erratum 814220 affects Cortex-A7 revisions r0p2-r0p5.
Automatically enable support code to mitigate the erratum when compiling
a kernel for any of the affected Renesas SoCs:
- R-Mobile APE6: r0p2,
- RZ/G1E: r0p5,
- RZ/G1C: r0p5,
- R-Car H2: r0p3,
- R-Car E2: r0p5,
- RZ/N1: r0p5.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au>