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The clk_register_divider() and clk_register_mux() functions returns
error pointers on error but this code checks for NULL. Fix that.
Fixes: b9e0d40c0d ("clk: keystone: add Keystone PLL clock driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/d9da4c97-0da9-499f-9a21-1f8e3f148dc1@moroto.mountain
Signed-off-by: Stephen Boyd <sboyd@kernel.org>