ARM: sunxi: remove empty #ifdef/endif block

Whatever code this was guarding has been removed so remove the guards
too.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
diff --git a/arch/arm/mach-sunxi/board.c b/arch/arm/mach-sunxi/board.c
index 7ac8360..58fef05 100644
--- a/arch/arm/mach-sunxi/board.c
+++ b/arch/arm/mach-sunxi/board.c
@@ -207,9 +207,6 @@
 	eth_init_board();
 }
 
-#ifdef CONFIG_SPL_BUILD
-#endif
-
 /* The sunxi internal brom will try to loader external bootloader
  * from mmc0, nand flash, mmc2.
  */