clk: exynos5410: Removed duplicate entry in the clock tree.

This repeated entry was preventing the logic in arch/arm/plat-samsung/clock.c
from creating a DebugFS representation of the clock tree under the
directory /sys/kernel/debug/clock.
Merge pull request #57 from hsnaves/odroidxu-3.4.y

clk: exynos5410: Removed duplicate entry in the clock tree.