fpga: zynqpl: Do not place bitstream below 1MB

DMA doesn't work when src is placed below 1MB limit.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>

drivers/fpga/zynqpl.c

diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c
index f2f49b5..1effbad 100644
--- a/drivers/fpga/zynqpl.c
+++ b/drivers/fpga/zynqpl.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <asm/io.h>
 #include <zynqpl.h>
+#include <asm/sizes.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/sys_proto.h>
 
@@ -177,6 +178,12 @@
 		return FPGA_FAIL;
 	}
 
+	if ((u32)buf < SZ_1M) {
+		printf("%s: Bitstream has to be placed up to 1MB (%x)\n",
+		       __func__, (u32)buf);
+		return FPGA_FAIL;
+	}
+
 	if ((u32)buf != ALIGN((u32)buf, ARCH_DMA_MINALIGN)) {
 		u32 *new_buf = (u32 *)ALIGN((u32)buf, ARCH_DMA_MINALIGN);