smifb2-dkms DKMS FTBFS wrt Linux 6.6

[Impact]

...
/var/lib/dkms/smifb2/2.2.3.4.g1828e79/build/smi_drv.c:505:10: error: ‘struct drm_driver’ has no member named ‘gem_prime_mmap’; did you mean ‘gem_prime_import’?
  505 | .gem_prime_mmap = drm_gem_prime_mmap,
      | ^~~~~~~~~~~~~~
      | gem_prime_import
/var/lib/dkms/smifb2/2.2.3.4.g1828e79/build/smi_drv.c:505:37: error: initialization of ‘void (*)(struct drm_printer *, struct drm_file *)’ from incompatible pointer type ‘int (*)(struct drm_gem_object *, struct vm_area_struct *)’ [-Werror=incompatible-pointer-types]
  505 | .gem_prime_mmap = drm_gem_prime_mmap,
      | ^~~~~~~~~~~~~~~~~~
/var/lib/dkms/smifb2/2.2.3.4.g1828e79/build/smi_drv.c:505:37: note: (near initialization for ‘driver.show_fdinfo’)
/var/lib/dkms/smifb2/2.2.3.4.g1828e79/build/smi_drv.c:522:31: error: ‘drm_gem_prime_handle_to_fd’ undeclared here (not in a function)
  522 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
/var/lib/dkms/smifb2/2.2.3.4.g1828e79/build/smi_drv.c:523:31: error: ‘drm_gem_prime_fd_to_handle’ undeclared here (not in a function)
  523 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
...

[Fix]

Apply the attached fix.

[How to test]

Install (and build) the patched package.

[Regression potential]

Low: all fixes are conditionally compiled only for Linux >= 6.6.