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

Add UTMI support for SAMA7G5. SAMA7G5's UTMI control is done via
XTALF register. Values written at bits 2..0 in this register
correspond to the on board crystal oscillator frequency.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 264b36c..d34005f 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -88,6 +88,9 @@
 struct clk *
 at91_clk_register_utmi(void __iomem *base, struct udevice *dev,
 			const char *name, const char *parent_name);
+struct clk *
+at91_clk_sama7g5_register_utmi(void __iomem *base, const char *name,
+			const char *parent_name);
 
 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);