clk: Improve a size determination in two functions

Replace the specification of two data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk.c

@@ -2973,7 +2973,7 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb)
 
 	/* if clk wasn't in the notifier list, allocate new clk_notifier */
 	if (cn->clk != clk) {
-		cn = kzalloc(sizeof(struct clk_notifier), GFP_KERNEL);
+		cn = kzalloc(sizeof(*cn), GFP_KERNEL);
 		if (!cn)
 			goto out;
 
@@ -3121,7 +3121,7 @@ int of_clk_add_provider(struct device_node *np,
 	struct of_clk_provider *cp;
 	int ret;
 
-	cp = kzalloc(sizeof(struct of_clk_provider), GFP_KERNEL);
+	cp = kzalloc(sizeof(*cp), GFP_KERNEL);
 	if (!cp)
 		return -ENOMEM;