ARM: dts: Remove '0x's from Exynos4210 DTSI file

... for the sake of consistency and assumed convention.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>