ARM: uniphier: remove unneeded argument of uniphier_ld20_pll_init()

At first, we thought the LD20 PLL setting would be board dependent,
but this argument turned out unneeded after all.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/init.h b/arch/arm/mach-uniphier/init.h
index f3f9e54..af74dd8 100644
--- a/arch/arm/mach-uniphier/init.h
+++ b/arch/arm/mach-uniphier/init.h
@@ -105,7 +105,7 @@
 void uniphier_ld4_pll_init(void);
 void uniphier_pro4_pll_init(void);
 void uniphier_ld11_pll_init(void);
-int uniphier_ld20_pll_init(const struct uniphier_board_data *bd);
+void uniphier_ld20_pll_init(void);
 
 void uniphier_ld4_clk_init(void);
 void uniphier_pro4_clk_init(void);