clk: renesas: r8a77970: Add RPC clocks

On R-Car V3M (R8A77970), the RPC/RPCD2 clocks are output by the common
divider. Describe them, as well as the RPC-IF module clock.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/clk/renesas/r8a77970-cpg-mssr.c

@@ -91,6 +91,9 @@ static const struct cpg_core_clk r8a77970_core_clks[] __initconst = {
 		 CLK_PLL1_DIV2),
 	DEF_BASE("sd0",	R8A77970_CLK_SD0, CLK_TYPE_R8A77970_SD0, CLK_PLL1_DIV2),
 
+	DEF_FIXED("rpc",	R8A77970_CLK_RPC,   CLK_PLL1_DIV2,  5, 1),
+	DEF_FIXED("rpcd2",	R8A77970_CLK_RPCD2, CLK_PLL1_DIV2, 10, 1),
+
 	DEF_FIXED("cl",		R8A77970_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
 	DEF_FIXED("cp",		R8A77970_CLK_CP,    CLK_EXTAL,	    2, 1),
 
@@ -152,6 +155,7 @@ static const struct mssr_mod_clk r8a77970_mod_clks[] __initconst = {
 	DEF_MOD("gpio1",		 911,	R8A77970_CLK_CP),
 	DEF_MOD("gpio0",		 912,	R8A77970_CLK_CP),
 	DEF_MOD("can-fd",		 914,	R8A77970_CLK_S2D2),
+	DEF_MOD("rpc-if",		 917,	R8A77970_CLK_RPC),
 	DEF_MOD("i2c4",			 927,	R8A77970_CLK_S2D2),
 	DEF_MOD("i2c3",			 928,	R8A77970_CLK_S2D2),
 	DEF_MOD("i2c2",			 929,	R8A77970_CLK_S2D2),