DMA for (H)SCIF(A|B) serial ports on Renesas R-Car Gen2 and RZ/G1 SoCs
is considered stable, hence enable it by default.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>