kernel: bump 4.19 to 4.19.68

Refreshed all patches.

Remove upstreamed:
- 950-0307-Revert-pwm-Set-class-for-exported-channels-in-sysfs.patch

Compile-tested on: cns3xxx
Runtime-tested on: cns3xxx

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

target/linux/generic/pending-4.19/630-packet_socket_type.patch

@@ -87,7 +87,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	if (!net_eq(dev_net(dev), sock_net(sk)))
  		goto drop;
  
-@@ -3251,6 +3253,7 @@ static int packet_create(struct net *net
+@@ -3258,6 +3260,7 @@ static int packet_create(struct net *net
  	mutex_init(&po->pg_vec_lock);
  	po->rollover = NULL;
  	po->prot_hook.func = packet_rcv;
@@ -95,7 +95,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
  	if (sock->type == SOCK_PACKET)
  		po->prot_hook.func = packet_rcv_spkt;
-@@ -3862,6 +3865,16 @@ packet_setsockopt(struct socket *sock, i
+@@ -3869,6 +3872,16 @@ packet_setsockopt(struct socket *sock, i
  		po->xmit = val ? packet_direct_xmit : dev_queue_xmit;
  		return 0;
  	}
@@ -112,7 +112,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	default:
  		return -ENOPROTOOPT;
  	}
-@@ -3914,6 +3927,13 @@ static int packet_getsockopt(struct sock
+@@ -3921,6 +3934,13 @@ static int packet_getsockopt(struct sock
  	case PACKET_VNET_HDR:
  		val = po->has_vnet_hdr;
  		break;