kernel: remove a hack that was obsoleted upstream

Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>

target/linux/generic/patches-4.4/997-device_tree_cmdline.patch

@@ -1,24 +0,0 @@
---- a/drivers/of/fdt.c
-+++ b/drivers/of/fdt.c
-@@ -956,6 +956,9 @@ int __init early_init_dt_scan_chosen(uns
- 	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
---- a/arch/mips/kernel/prom.c
-+++ b/arch/mips/kernel/prom.c
-@@ -51,6 +51,9 @@ void * __init early_init_dt_alloc_memory
- 
- void __init __dt_setup_arch(void *bph)
- {
-+	if (boot_command_line[0] == '\0')
-+		strcpy(boot_command_line, arcs_cmdline);
-+
- 	if (!early_init_dt_scan(bph))
- 		return;
- 

target/linux/lantiq/dts/DGN3500.dtsi

@@ -2,7 +2,7 @@
 
 / {
 	chosen {
-		bootargs-append = "root= console=ttyLTQ0,115200";
+		bootargs = "root= console=ttyLTQ0,115200";
 
 		leds {
 			boot = &power_green;