accel/rocket: Fix usages of kfree() and sizeof()

accel/rocket: Fix usages of kfree() and sizeof()

Replace usages of kfree() with kvfree() for pointers which were
allocated using kvmalloc(), as required by the kernel memory management
API.

Use sizeof() on the type that a pointer references instead of the
pointer itself. In this case, scheds and *scheds both happen to be
pointers, so sizeof() will expand to the same value in either case, but
using *scheds is more technically correct since scheds is an array of
drm_gpu_scheduler *.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@inria.fr>
Closes: https://lore.kernel.org/r/202508120730.PLbjlKbI-lkp@intel.com/
Signed-off-by: Brigham Campbell <me@brighamcampbell.com>
Signed-off-by: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Link: https://lore.kernel.org/r/20250813-rocket-free-fix-v1-1-51f00a7a1271@brighamcampbell.com
Fixes: 0810d5ad88a1 ("accel/rocket: Add job submission IOCTL")