image: Rename load_addr, save_addr, save_size

These global variables are quite short and generic. In fact the same name
is more often used locally for struct members and function arguments.

Add a image_ prefix to make them easier to distinguish.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/net/net.c b/net/net.c
index 5199d67..b9bf0d1 100644
--- a/net/net.c
+++ b/net/net.c
@@ -636,7 +636,7 @@
 				printf("Bytes transferred = %d (%x hex)\n",
 				       net_boot_file_size, net_boot_file_size);
 				env_set_hex("filesize", net_boot_file_size);
-				env_set_hex("fileaddr", load_addr);
+				env_set_hex("fileaddr", image_load_addr);
 			}
 			if (protocol != NETCONS)
 				eth_halt();
diff --git a/net/nfs.c b/net/nfs.c
index f4101eb..5226e2c 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -88,14 +88,15 @@
 
 	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 		/* start address in flash? */
-		if (load_addr + offset >= flash_info[i].start[0]) {
+		if (image_load_addr + offset >= flash_info[i].start[0]) {
 			rc = 1;
 			break;
 		}
 	}
 
 	if (rc) { /* Flash is destination for this packet */
-		rc = flash_write((uchar *)src, (ulong)(load_addr+offset), len);
+		rc = flash_write((uchar *)src, (ulong)image_load_addr + offset,
+				 len);
 		if (rc) {
 			flash_perror(rc);
 			return -1;
@@ -103,7 +104,7 @@
 	} else
 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
 	{
-		void *ptr = map_sysmem(load_addr + offset, len);
+		void *ptr = map_sysmem(image_load_addr + offset, len);
 
 		memcpy(ptr, src, len);
 		unmap_sysmem(ptr);
@@ -912,7 +913,7 @@
 		       net_boot_file_expected_size_in_blocks << 9);
 		print_size(net_boot_file_expected_size_in_blocks << 9, "");
 	}
-	printf("\nLoad address: 0x%lx\nLoading: *\b", load_addr);
+	printf("\nLoad address: 0x%lx\nLoading: *\b", image_load_addr);
 
 	net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
 	net_set_udp_handler(nfs_handler);
diff --git a/net/tftp.c b/net/tftp.c
index 1e3c18a..899d3b8 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -221,7 +221,7 @@
 	ulong tosend = len;
 
 	tosend = min(net_boot_file_size - offset, tosend);
-	(void)memcpy(dst, (void *)(save_addr + offset), tosend);
+	(void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
 	debug("%s: block=%d, offset=%ld, len=%d, tosend=%ld\n", __func__,
 	      block, offset, len, tosend);
 	return tosend;
@@ -605,7 +605,7 @@
 	}
 }
 
-/* Initialize tftp_load_addr and tftp_load_size from load_addr and lmb */
+/* Initialize tftp_load_addr and tftp_load_size from image_load_addr and lmb */
 static int tftp_init_load_addr(void)
 {
 #ifdef CONFIG_LMB
@@ -614,13 +614,13 @@
 
 	lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 
-	max_size = lmb_get_free_size(&lmb, load_addr);
+	max_size = lmb_get_free_size(&lmb, image_load_addr);
 	if (!max_size)
 		return -1;
 
 	tftp_load_size = max_size;
 #endif
-	tftp_load_addr = load_addr;
+	tftp_load_addr = image_load_addr;
 	return 0;
 }
 
@@ -710,9 +710,9 @@
 #ifdef CONFIG_CMD_TFTPPUT
 	tftp_put_active = (protocol == TFTPPUT);
 	if (tftp_put_active) {
-		printf("Save address: 0x%lx\n", save_addr);
-		printf("Save size:    0x%lx\n", save_size);
-		net_boot_file_size = save_size;
+		printf("Save address: 0x%lx\n", image_save_addr);
+		printf("Save size:    0x%lx\n", image_save_size);
+		net_boot_file_size = image_save_size;
 		puts("Saving: *\b");
 		tftp_state = STATE_SEND_WRQ;
 		new_transfer();