hooks: Fix build after 6.10

Since commit b1992c3772e6 ("kbuild: use $(src) instead of (srctree)/(src) for source directory") in the kernel, passing a relative dir doesn't work anymore. Just building xe.ko is not the equivalent neither.

We can either pass M= or just pass the dir. The latter is apparently more semantically correct.

Link: https://lore.kernel.org/intel-xe/efbt3hl22g73r3372agpzowfejrpxzvaiqu2ysscntwa6dtioe@2ao55jz262rs/ Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com