clk: samsung: exynos5433: add missing slab.h header
After the commit
ee9bfe5eb9de9a ("clk: samsung: exynos5433: Fix
error paths"), missing slab.h header causes build issue for using
kfree(). Add missing header as like mainline commit
faac3604d05e
which is upstream version of
ee9bfe5eb9de9a.
Change-Id: Ib47a3fe79a049fca11d6ac3f2a626156dd5696a7
Fixes:
ee9bfe5eb9de9a ("clk: samsung: exynos5433: Fix error paths")
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>