net: cosmetic: Fixup var names related to boot file

The variables around the bootfile were inconsistent and used CamelCase.
Update them to make the code more readable.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/common/cmd_net.c b/common/cmd_net.c
index 53760a2..d75718c 100644
--- a/common/cmd_net.c
+++ b/common/cmd_net.c
@@ -201,11 +201,13 @@
 		if (end == (argv[1] + strlen(argv[1])))
 			load_addr = addr;
 		else
-			copy_filename(BootFile, argv[1], sizeof(BootFile));
+			copy_filename(net_boot_file_name, argv[1],
+				      sizeof(net_boot_file_name));
 		break;
 
 	case 3:	load_addr = simple_strtoul(argv[1], NULL, 16);
-		copy_filename(BootFile, argv[2], sizeof(BootFile));
+		copy_filename(net_boot_file_name, argv[2],
+			      sizeof(net_boot_file_name));
 
 		break;
 
@@ -216,7 +218,8 @@
 			printf("Invalid address/size\n");
 			return CMD_RET_USAGE;
 		}
-		copy_filename(BootFile, argv[3], sizeof(BootFile));
+		copy_filename(net_boot_file_name, argv[3],
+			      sizeof(net_boot_file_name));
 		break;
 #endif
 	default:
diff --git a/common/cmd_pxe.c b/common/cmd_pxe.c
index 9eac5c6..5cde5b6 100644
--- a/common/cmd_pxe.c
+++ b/common/cmd_pxe.c
@@ -1568,7 +1568,7 @@
 
 	destroy_pxe_menu(cfg);
 
-	copy_filename(BootFile, "", sizeof(BootFile));
+	copy_filename(net_boot_file_name, "", sizeof(net_boot_file_name));
 
 	return 0;
 }
diff --git a/common/update.c b/common/update.c
index cc830a7..bc0c48f 100644
--- a/common/update.c
+++ b/common/update.c
@@ -58,7 +58,7 @@
 	saved_timeout_msecs = TftpRRQTimeoutMSecs;
 	saved_timeout_count = TftpRRQTimeoutCountMax;
 	saved_netretry = strdup(getenv("netretry"));
-	saved_bootfile = strdup(BootFile);
+	saved_bootfile = strdup(net_boot_file_name);
 
 	/* set timeouts for auto-update */
 	TftpRRQTimeoutMSecs = msec_max;
@@ -69,7 +69,7 @@
 
 	/* download the update file */
 	load_addr = addr;
-	copy_filename(BootFile, filename, sizeof(BootFile));
+	copy_filename(net_boot_file_name, filename, sizeof(net_boot_file_name));
 	size = NetLoop(TFTPGET);
 
 	if (size < 0)
@@ -86,7 +86,8 @@
 		free(saved_netretry);
 
 	if (saved_bootfile != NULL) {
-		copy_filename(BootFile, saved_bootfile, sizeof(BootFile));
+		copy_filename(net_boot_file_name, saved_bootfile,
+			      sizeof(net_boot_file_name));
 		free(saved_bootfile);
 	}