vlan: don't try to include files from ${HOME}/linux/include

vlan sources explicitly adds ~/linux/include to compiler include path.
If that directory does exist, this leads to various issues. Drop this
explicit exclude path.

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>