drm/xe/xe_migrate: Cast to output precision before multiplying operands
In the Linux kernel, the following vulnerability has been resolved:

drm/xe/xe_migrate: Cast to output precision before multiplying operands

Addressing potential overflow in result of  multiplication of two lower
precision (u32) operands before widening it to higher precision
(u64).

-v2
Fix commit message and description. (Rodrigo)

(cherry picked from commit 34820967ae7b45411f8f4f737c2d63b0c608e0d7)