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

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

Fixes: 535f296d47de ("clk: tegra: Add suspend and resume support on Tegra210")
Reported-by: Stephen Boyd <[e-mail]>
Signed-off-by: Dmitry Osipenko <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]
Acked-by: Thierry Reding <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/tegra/clk.c

···
 	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;