clk: loongson1: Terminate clk_div_table with sentinel element

In order that the end of a clk_div_table can be detected, it must be
terminated with a sentinel element (.div = 0).

Fixes: b4626a7f4892 ("CLK: Add Loongson1C clock support")
Signed-off-by: Jonathan Neuschäfer <[e-mail]>
Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/loongson1/clk-loongson1c.c

···
 	[1] = { .val = 1, .div = 4 },
 	[2] = { .val = 2, .div = 3 },
 	[3] = { .val = 3, .div = 3 },
+	[4] = { /* sentinel */ }
 };
 
 void __init ls1x_clk_init(void)