kernel: bump 4.19 to 4.19.75

Refreshed all patches.

Fixes:
- CVE-2019-14814
- CVE-2019-14815
- CVE-2019-14816
- CVE-2019-14821

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

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

target/linux/ath79/patches-4.19/910-unaligned_access_hacks.patch

@@ -241,7 +241,7 @@
   */
 --- a/net/ipv6/datagram.c
 +++ b/net/ipv6/datagram.c
-@@ -478,7 +478,7 @@ int ipv6_recv_error(struct sock *sk, str
+@@ -480,7 +480,7 @@ int ipv6_recv_error(struct sock *sk, str
  				ipv6_iface_scope_id(&sin->sin6_addr,
  						    IP6CB(skb)->iif);
  		} else {
@@ -250,7 +250,7 @@
  					       &sin->sin6_addr);
  			sin->sin6_scope_id = 0;
  		}
-@@ -828,12 +828,12 @@ int ip6_datagram_send_ctl(struct net *ne
+@@ -830,12 +830,12 @@ int ip6_datagram_send_ctl(struct net *ne
  			}
  
  			if (fl6->flowlabel&IPV6_FLOWINFO_MASK) {