arm64: defconfig: Enable SH Mobile I2C controller

Enable SH Mobile I2C controller for use on R-Car Gen3 SoCs.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/configs/defconfig

@@ -251,6 +251,7 @@ CONFIG_I2C_MESON=y
 CONFIG_I2C_MV64XXX=y
 CONFIG_I2C_QUP=y
 CONFIG_I2C_RK3X=y
+CONFIG_I2C_SH_MOBILE=y
 CONFIG_I2C_TEGRA=y
 CONFIG_I2C_UNIPHIER_F=y
 CONFIG_I2C_RCAR=y