clk: Use 'parent' to shorten lines in __clk_core_init()

Some lines are getting long in this function. Let's move 'parent' up to
the top of the function and use it in many places whenever there is a
parent for a clk. This shortens some lines by avoiding core->parent->
indirections.

Cc: Douglas Anderson <dianders@chromium.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20200205232802.29184-3-sboyd@kernel.orgAcked-by: Jerome Brunet <jbrunet@baylibre.com>

drivers/clk/clk.c

@@ -3342,6 +3342,7 @@ static void clk_core_reparent_orphans_nolock(void)
 static int __clk_core_init(struct clk_core *core)
 {
 	int ret;
+	struct clk_core *parent;
 	unsigned long rate;
 
 	if (!core)
@@ -3413,7 +3414,7 @@ static int __clk_core_init(struct clk_core *core)
 			goto out;
 	}
 
-	core->parent = __clk_init_parent(core);
+	parent = core->parent = __clk_init_parent(core);
 
 	/*
 	 * Populate core->parent if parent has already been clk_core_init'd. If
@@ -3425,10 +3426,9 @@ static int __clk_core_init(struct clk_core *core)
 	 * clocks and re-parent any that are children of the clock currently
 	 * being clk_init'd.
 	 */
-	if (core->parent) {
-		hlist_add_head(&core->child_node,
-				&core->parent->children);
-		core->orphan = core->parent->orphan;
+	if (parent) {
+		hlist_add_head(&core->child_node, &parent->children);
+		core->orphan = parent->orphan;
 	} else if (!core->num_parents) {
 		hlist_add_head(&core->child_node, &clk_root_list);
 		core->orphan = false;
@@ -3446,9 +3446,9 @@ static int __clk_core_init(struct clk_core *core)
 	 */
 	if (core->ops->recalc_accuracy)
 		core->accuracy = core->ops->recalc_accuracy(core->hw,
-					__clk_get_accuracy(core->parent));
-	else if (core->parent)
-		core->accuracy = core->parent->accuracy;
+					__clk_get_accuracy(parent));
+	else if (parent)
+		core->accuracy = parent->accuracy;
 	else
 		core->accuracy = 0;
 
@@ -3472,9 +3472,9 @@ static int __clk_core_init(struct clk_core *core)
 	 */
 	if (core->ops->recalc_rate)
 		rate = core->ops->recalc_rate(core->hw,
-				clk_core_get_rate_nolock(core->parent));
-	else if (core->parent)
-		rate = core->parent->rate;
+				clk_core_get_rate_nolock(parent));
+	else if (parent)
+		rate = parent->rate;
 	else
 		rate = 0;
 	core->rate = core->req_rate = rate;