clk: at91: clk-master: add support for sama7g5

Add master clock (MCK1..MCK4) support for SAMA7G5. SAMA7G5's PMC has
multiple master clocks feeding different subsystems. One of them
feeds image subsystem and is changeable based on image subsystem
needs.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 33c7a66..49e1e37 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -80,6 +80,11 @@
 			const struct clk_master_layout *layout,
 			const struct clk_master_characteristics *characteristics,
 			const u32 *mux_table);
+struct clk *
+at91_clk_sama7g5_register_master(void __iomem *base, const char *name,
+			const char * const *parent_names, int num_parents,
+			const u32 *mux_table, const u32 *clk_mux_table,
+			bool critical, u8 id);
 
 int at91_clk_mux_val_to_index(const u32 *table, u32 num_parents, u32 val);
 int at91_clk_mux_index_to_val(const u32 *table, u32 num_parents, u32 index);