clk: samsung: Fix CLK_SMMU_FIMCL3 clock name on Exynos542x

The proper name for CLK_SMMU_FIMCL3 is "smmu_fimcl3". Remove obvious
typo.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>