ARM: dts: exynos: align pinctrl with dtschema in Exynos3250

Align the pin controller related nodes with dtschema.  No functional
change expected.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220111201722.327219-4-krzysztof.kozlowski@canonical.com