Use R8A7779_CLK_P as parent clock for SCIF devices on r8a7779.
With this change in place the SCIF CCF handling matches the
legacy clock code. Also, this matches the data sheet.
Signed-off-by: NMagnus Damm <damm+renesas@opensource.se>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>