net: Fix the displayed value of bytes transferred

In the case of NETLOOP_SUCCESS, the decimal value of the u32 variable
"net_boot_file_size" is printed using "%d", resulting in negative values
being reported for large file sizes. Fix this by using "%u" to print the
decimal value corresponding to the bytes transferred.

Fixes: 1411157d8578 ("net: cosmetic: Fixup var names related to boot file")
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/net/net.c b/net/net.c
index 43abbac..e6f61f0 100644
--- a/net/net.c
+++ b/net/net.c
@@ -716,7 +716,7 @@
 		case NETLOOP_SUCCESS:
 			net_cleanup_loop();
 			if (net_boot_file_size > 0) {
-				printf("Bytes transferred = %d (%x hex)\n",
+				printf("Bytes transferred = %u (%x hex)\n",
 				       net_boot_file_size, net_boot_file_size);
 				env_set_hex("filesize", net_boot_file_size);
 				env_set_hex("fileaddr", image_load_addr);