arm: zynq: Return value from fdtdec_setup_memory_banksize directly

There is no reason not to return return value from above function.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/zynq/board.c b/board/xilinx/zynq/board.c
index 90ef542..871e9dc 100644
--- a/board/xilinx/zynq/board.c
+++ b/board/xilinx/zynq/board.c
@@ -132,9 +132,7 @@
 #if !defined(CONFIG_SYS_SDRAM_BASE) && !defined(CONFIG_SYS_SDRAM_SIZE)
 int dram_init_banksize(void)
 {
-	fdtdec_setup_memory_banksize();
-
-	return 0;
+	return fdtdec_setup_memory_banksize();
 }
 
 int dram_init(void)