sunxi: Add support for I2C on H6 like SoCs

I2C support, especially R_I2C port, will be needed in future. Upcoming
support for H616 will need R_I2C to adjust DRAM voltage.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index 36b1425..edb9973 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -730,7 +730,7 @@
 	See I2C0_ENABLE help text.
 endif
 
-if SUNXI_GEN_SUN6I
+if SUNXI_GEN_SUN6I || SUN50I_GEN_H6
 config R_I2C_ENABLE
 	bool "Enable the PRCM I2C/TWI controller"
 	# This is used for the pmic on H3