Update Linux to v5.10.109

Sourced from [1]

[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz

Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/include/uapi/linux/if.h b/include/uapi/linux/if.h
index 7fea0fd..797ba2c 100644
--- a/include/uapi/linux/if.h
+++ b/include/uapi/linux/if.h
@@ -33,6 +33,7 @@
 #define	IFNAMSIZ	16
 #endif /* __UAPI_DEF_IF_IFNAMSIZ */
 #define	IFALIASZ	256
+#define	ALTIFNAMSIZ	128
 #include <linux/hdlc/ioctl.h>
 
 /* For glibc compatibility. An empty enum does not compile. */
@@ -177,6 +178,7 @@
 enum {
 	IF_LINK_MODE_DEFAULT,
 	IF_LINK_MODE_DORMANT,	/* limit upward transition to dormant */
+	IF_LINK_MODE_TESTING,	/* limit upward transition to testing */
 };
 
 /*
@@ -212,6 +214,7 @@
 		fr_proto		__user *fr;
 		fr_proto_pvc		__user *fr_pvc;
 		fr_proto_pvc_info	__user *fr_pvc_info;
+		x25_hdlc_proto		__user *x25;
 
 		/* interface settings */
 		sync_serial_settings	__user *sync;