arm: exynos: i2c: Convert exynos boards to use DM_I2C

Three boards are still not converting to use DM_I2C. They are also using
the old PMIC framework. Rather than removing them, add #ifdefs to allow
them to continue to build. This will give the maintainers a little more
time to decide whether to convert them or not.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cead040..f011026 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -406,6 +406,7 @@
 config ARCH_EXYNOS
 	bool "Samsung EXYNOS"
 	select DM
+	select DM_I2C
 	select DM_SPI_FLASH
 	select DM_SERIAL
 	select DM_SPI