phy: ti: am654-serdes: Don't reference clk_init_data after registration

A future patch is going to change semantics of clk_register() so that
clk_hw::init is guaranteed to be NULL after a clk is registered. Avoid
referencing this member here so that we don't run into NULL pointer
exceptions.

Cc: Roger Quadros <rogerq@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190731193517.237136-9-sboyd@kernel.orgAcked-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/ti/phy-am654-serdes.c

@@ -335,6 +335,7 @@ static int serdes_am654_clk_mux_set_parent(struct clk_hw *hw, u8 index)
 {
 	struct serdes_am654_clk_mux *mux = to_serdes_am654_clk_mux(hw);
 	struct regmap *regmap = mux->regmap;
+	const char *name = clk_hw_get_name(hw);
 	unsigned int reg = mux->reg;
 	int clk_id = mux->clk_id;
 	int parents[SERDES_NUM_CLOCKS];
@@ -374,8 +375,7 @@ static int serdes_am654_clk_mux_set_parent(struct clk_hw *hw, u8 index)
 		 * This can never happen, unless we missed
 		 * a valid combination in serdes_am654_mux_table.
 		 */
-		WARN(1, "Failed to find the parent of %s clock\n",
-		     hw->init->name);
+		WARN(1, "Failed to find the parent of %s clock\n", name);
 		return -EINVAL;
 	}