ANDROID: GKI: add vendor padding variable in struct skb_shared_info

Some vendors want to add things to 'struct skb_shared_info', so give
them an array to place their data.

Bug: 171013716
Signed-off-by: Vignesh Saravanaperumal <vignesh1.s@samsung.com>
Change-Id: Ia0024e3e8de89f4ef335fa26208ec6c45abafb22

include/linux/skbuff.h

@@ -41,6 +41,7 @@
 #include <linux/netfilter/nf_conntrack_common.h>
 #endif
 #include <linux/android_kabi.h>
+#include <linux/android_vendor.h>
 
 /* The interface for checksum offload between the stack and networking drivers
  * is as follows...
@@ -532,6 +533,8 @@ struct skb_shared_info {
 	 * remains valid until skb destructor */
 	void *		destructor_arg;
 
+	ANDROID_OEM_DATA_ARRAY(1, 3);
+
 	/* must be last field, see pskb_expand_head() */
 	skb_frag_t	frags[MAX_SKB_FRAGS];
 };