added kbuild flags

Signed-off-by: klozz <xxx.reptar.rawrr.xxx@gmail.com>
XPerience Sauce :v if you copy it please give me credits is my exsaustive search for make a good performance ;)

Signed-off-by: klozz <xxx.reptar.rawrr.xxx@gmail.com>
removed ftree

Signed-off-by: klozz <xxx.reptar.rawrr.xxx@gmail.com>