brcm2708: fix build error introduced in 2b4e5d47

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/brcm2708/patches-4.4/0050-fdt-Add-support-for-the-CONFIG_CMDLINE_EXTEND-option.patch

@@ -9,15 +9,12 @@ Subject: [PATCH 050/304] fdt: Add support for the CONFIG_CMDLINE_EXTEND option
 
 --- a/drivers/of/fdt.c
 +++ b/drivers/of/fdt.c
-@@ -954,22 +954,38 @@ int __init early_init_dt_scan_chosen(uns
+@@ -954,19 +954,38 @@ int __init early_init_dt_scan_chosen(uns
  
  	/* Retrieve command line */
  	p = of_get_flat_dt_prop(node, "bootargs", &l);
 -	if (p != NULL && l > 0)
 -		strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
--	p = of_get_flat_dt_prop(node, "bootargs-append", &l);
--	if (p != NULL && l > 0)
--		strlcat(data, p, min_t(int, strlen(data) + (int)l, COMMAND_LINE_SIZE));
  
  	/*
  	 * CONFIG_CMDLINE is meant to be a default in case nothing else