ARM: uniphier: make BCU init into void function

These functions never fail, so no need to return a value.

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 78c2eee..18393e5 100644
--- a/arch/arm/mach-uniphier/init.h
+++ b/arch/arm/mach-uniphier/init.h
@@ -73,8 +73,8 @@
 }
 #endif
 
-int uniphier_sld3_bcu_init(const struct uniphier_board_data *bd);
-int uniphier_ld4_bcu_init(const struct uniphier_board_data *bd);
+void uniphier_sld3_bcu_init(const struct uniphier_board_data *bd);
+void uniphier_ld4_bcu_init(const struct uniphier_board_data *bd);
 
 int uniphier_memconf_2ch_init(const struct uniphier_board_data *bd);
 int uniphier_memconf_3ch_no_disbit_init(const struct uniphier_board_data *bd);