clk: tegra: Fix double-free in tegra_clk_init()

It's unlikely to happen in practice ever, but makes static checkers happy.

Fixes: 535f296d ("clk: tegra: Add suspend and resume support on Tegra210")
Reported-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lkml.kernel.org/r/20191210020512.6088-1-digetx@gmail.comAcked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/tegra/clk.c

@@ -231,8 +231,10 @@ struct clk ** __init tegra_clk_init(void __iomem *regs, int num, int banks)
 	periph_banks = banks;
 
 	clks = kcalloc(num, sizeof(struct clk *), GFP_KERNEL);
-	if (!clks)
+	if (!clks) {
 		kfree(periph_clk_enb_refcnt);
+		return NULL;
+	}
 
 	clk_num = num;