ARM: kona: fix clk_bsc_enable() type mismatch for LTO

When building with LTO, the compiler complains about type mismatch of
function clk_bsc_enable() in file:
  arch/arm/cpu/armv7/kona-common/clk-stubs.c
vs other files that define or use this function:
  warning: type of ‘clk_bsc_enable’ does not match original declaration.

Change the type of this function to that of the other usages.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/arm/cpu/armv7/kona-common/clk-stubs.c

@@ -14,7 +14,7 @@ int __weak clk_sdio_enable(void *base, u32 rate, u32 *actual_ratep)
 	return 0;
 }
 
-int __weak clk_bsc_enable(void *base, u32 rate, u32 *actual_ratep)
+int __weak clk_bsc_enable(void *base)
 {
 	return 0;
 }