clk: highbank: Remove an unused field in struct hb_clk

In "struct hb_clk", the 'parent_name' field is unused.

Remove it.

Found with cppcheck, unusedStructMember.

Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/90b19f2af3[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/clk-highbank.c

···
 struct hb_clk {
         struct clk_hw	hw;
 	void __iomem	*reg;
-	char *parent_name;
 };
 #define to_hb_clk(p) container_of(p, struct hb_clk, hw)