clk: fixed-factor: Add CLK_FIXED_FACTOR_HW which takes clk_hw pointer as parent

With the new clk parenting code, clk_init_data was expanded to include
.parent_hws, for clk drivers to directly reference parents by clk_hw.

Add a new macro, CLK_FIXED_FACTOR_HW, that can take a struct clk_hw
pointer, instead of a string, as its parent.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

include/linux/clk-provider.h

@@ -985,6 +985,17 @@ extern struct of_device_id __clk_of_table;
 					      _flags),			\
 	}
 
+#define CLK_FIXED_FACTOR_HW(_struct, _name, _parent,			\
+			    _div, _mult, _flags)			\
+	struct clk_fixed_factor _struct = {				\
+		.div		= _div,					\
+		.mult		= _mult,				\
+		.hw.init	= CLK_HW_INIT_HW(_name,			\
+						 _parent,		\
+						 &clk_fixed_factor_ops,	\
+						 _flags),		\
+	}
+
 #ifdef CONFIG_OF
 int of_clk_add_provider(struct device_node *np,
 			struct clk *(*clk_src_get)(struct of_phandle_args *args,