Add support for R-Car V3M (R8A77970) to the R-Car RST driver -- this driver
is  needed  for the clock driver to work.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>