kernel: Update kernel 4.14 to version 4.14.187

Fixes:
- CVE-2020-10757

The "mtd: rawnand: Pass a nand_chip object to nand_release()" commit was
backported which needed some adaptations to other code.

Build tested: ramips

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/ar71xx/patches-4.14/910-unaligned_access_hacks.patch

@@ -276,7 +276,7 @@
  		case IPV6_2292HOPOPTS:
 --- a/net/ipv6/ip6_gre.c
 +++ b/net/ipv6/ip6_gre.c
-@@ -397,7 +397,7 @@ static void ip6gre_err(struct sk_buff *s
+@@ -400,7 +400,7 @@ static void ip6gre_err(struct sk_buff *s
  		return;
  	ipv6h = (const struct ipv6hdr *)skb->data;
  	greh = (const struct gre_base_hdr *)(skb->data + offset);
@@ -850,7 +850,7 @@
  		*sum = csum_fold(csum_partial(diff, sizeof(diff),
 --- a/drivers/net/vxlan.c
 +++ b/drivers/net/vxlan.c
-@@ -1868,15 +1868,15 @@ static int vxlan_build_skb(struct sk_buf
+@@ -1872,15 +1872,15 @@ static int vxlan_build_skb(struct sk_buf
  		return err;
  
  	vxh = __skb_push(skb, sizeof(*vxh));