i2c: sh_mobile: Use new clock calculation formulas for RZ/G2E

When switching the Gen3 SoCs to the new clock calculation formulas, the
match entry for RZ/G2E added in commit 51243b73 ("i2c:
sh_mobile: Add support for r8a774c0 (RZ/G2E)") was forgotten.

Fixes: e8a27567 ("i2c: sh_mobile: use new clock calculation formulas for Gen3")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>