clk: renesas: r8a779g0: Add I2C clocks

Add the module clocks used by the I2C Bus Interfaces on the Renesas
R-Car V4H (R8A779G0) SoC.

Extracted from a larger patch in the BSP by Kazuya Mizuguchi.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/f4b94f37950f6e976b68d0b32c324fb026d8b696.1662714852.git.geert+renesas@glider.be

drivers/clk/renesas/r8a779g0-cpg-mssr.c

@@ -154,6 +154,12 @@ static const struct mssr_mod_clk r8a779g0_mod_clks[] __initconst = {
 	DEF_MOD("hscif1",	515,	R8A779G0_CLK_S0D3_PER),
 	DEF_MOD("hscif2",	516,	R8A779G0_CLK_S0D3_PER),
 	DEF_MOD("hscif3",	517,	R8A779G0_CLK_S0D3_PER),
+	DEF_MOD("i2c0",		518,	R8A779G0_CLK_S0D6_PER),
+	DEF_MOD("i2c1",		519,	R8A779G0_CLK_S0D6_PER),
+	DEF_MOD("i2c2",		520,	R8A779G0_CLK_S0D6_PER),
+	DEF_MOD("i2c3",		521,	R8A779G0_CLK_S0D6_PER),
+	DEF_MOD("i2c4",		522,	R8A779G0_CLK_S0D6_PER),
+	DEF_MOD("i2c5",		523,	R8A779G0_CLK_S0D6_PER),
 	DEF_MOD("wdt1:wdt0",	907,	R8A779G0_CLK_R),
 };