arm64: dts: renesas: salvator-common: Prefer HSCIF1 over SCIF1

HSCIF is superior to SCIF (larger FIFOs, more accurate and wider
supported range of bitrates).

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>