clk: fixed-factor: Add CLK_FIXED_FACTOR_HWS which takes list of struct clk_hw *

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_HWS, that can take an array of pointers
to struct clk_hw, instead of a string, as its parent. Taking an array
instead of a direct pointer allows the reuse of the array for multiple
clks, rather than having one compound literal with the same contents
allocated for each clk declaration.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>

include/linux/clk-provider.h

@@ -996,6 +996,21 @@ extern struct of_device_id __clk_of_table;
 						 _flags),		\
 	}
 
+/*
+ * This macro allows the driver to reuse the _parent array for multiple
+ * fixed factor clk declarations.
+ */
+#define CLK_FIXED_FACTOR_HWS(_struct, _name, _parent,			\
+			     _div, _mult, _flags)			\
+	struct clk_fixed_factor _struct = {				\
+		.div		= _div,					\
+		.mult		= _mult,				\
+		.hw.init	= CLK_HW_INIT_HWS(_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,