clk: at91: usb: fix determine_rate prototype

Commit c67881fc is a backport of
0b67c43c upstream commit, fixing a
bug on clk rate change propagation.
But in 4.0 ->determine_rate() prototype has changed, thus introducing
a prototype mismatch when applying it on 3.19.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/clk/at91/clk-usb.c

@@ -58,8 +58,6 @@ static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw,
 
 static long at91sam9x5_clk_usb_determine_rate(struct clk_hw *hw,
 					      unsigned long rate,
-					      unsigned long min_rate,
-					      unsigned long max_rate,
 					      unsigned long *best_parent_rate,
 					      struct clk_hw **best_parent_hw)
 {