kernel: bump 4.9 to 4.9.148

Refreshed all patches.

Altered patches:
- 902-debloat_proc.patch

Removed upstreamed:
- 424-v4.20-net-dsa-fix-88e6060-roaming.patch

Compile-tested on: ar7
Runtime-tested on: none

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/generic/hack-4.9/902-debloat_proc.patch

@@ -221,13 +221,14 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	if (!root_irq_dir)
 --- a/kernel/time/timer_list.c
 +++ b/kernel/time/timer_list.c
-@@ -399,6 +399,8 @@ static int __init init_timer_list_procfs
+@@ -399,6 +399,9 @@ static int __init init_timer_list_procfs
  {
  	struct proc_dir_entry *pe;
  
 +	if (IS_ENABLED(CONFIG_PROC_STRIPPED))
 +		return 0;
- 	pe = proc_create("timer_list", 0444, NULL, &timer_list_fops);
++
+ 	pe = proc_create("timer_list", 0400, NULL, &timer_list_fops);
  	if (!pe)
  		return -ENOMEM;
 --- a/mm/vmalloc.c