Does not compile against Kernel 6.8+

[ich777]

As a follow up to #168, does not compile against Kernel 6.8+

/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:36:8: error: type defaults to 'int' in declaration of 'DEFINE_STATIC_KEY_FALSE' [-Werror=implicit-int]
   36 | static DEFINE_STATIC_KEY_FALSE(has_movntdqa);
      |        ^~~~~~~~~~~~~~~~~~~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:36:1: warning: parameter names (without types) in function declaration
   36 | static DEFINE_STATIC_KEY_FALSE(has_movntdqa);
      | ^~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c: In function 'i915_memcpy_from_wc':
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:118:13: error: implicit declaration of function 'static_branch_likely' [-Werror=implicit-function-declaration]
  118 |         if (static_branch_likely(&has_movntdqa)) {
      |             ^~~~~~~~~~~~~~~~~~~~
  CC [M]  /usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_sw_fence_work.o
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:118:35: error: 'has_movntdqa' undeclared (first use in this function)
  118 |         if (static_branch_likely(&has_movntdqa)) {
      |                                   ^~~~~~~~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:118:35: note: each undeclared identifier is reported only once for each function it appears in
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c: In function 'i915_unaligned_memcpy_from_wc':
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:148:17: error: implicit declaration of function 'memcpy' [-Werror=implicit-function-declaration]
  148 |                 memcpy(dst, src, x);
      |                 ^~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:29:1: note: include '<string.h>' or provide a declaration of 'memcpy'
   28 | #include "i915_memcpy.h"
  +++ |+#include <string.h>
   29 | 
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:148:17: warning: incompatible implicit declaration of built-in function 'memcpy' [-Wbuiltin-declaration-mismatch]
  148 |                 memcpy(dst, src, x);
      |                 ^~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:148:17: note: include '<string.h>' or provide a declaration of 'memcpy'
  CC [M]  /usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_syncmap.o
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c: In function 'i915_memcpy_init_early':
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:165:13: error: implicit declaration of function 'static_cpu_has' [-Werror=implicit-function-declaration]
  165 |         if (static_cpu_has(X86_FEATURE_XMM4_1) &&
      |             ^~~~~~~~~~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:166:14: error: implicit declaration of function 'boot_cpu_has' [-Werror=implicit-function-declaration]
  166 |             !boot_cpu_has(X86_FEATURE_HYPERVISOR))
      |              ^~~~~~~~~~~~
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:167:17: error: implicit declaration of function 'static_branch_enable' [-Werror=implicit-function-declaration]
  167 |                 static_branch_enable(&has_movntdqa);
      |                 ^~~~~~~~~~~~~~~~~~~~
  CC [M]  /usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_user_extensions.o
/usr/src/i915-sriov-dkms/drivers/gpu/drm/i915/i915_memcpy.c:167:39: error: 'has_movntdqa' undeclared (first use in this function)
  167 |                 static_branch_enable(&has_movntdqa);
      |                                       ^~~~~~~~~~~~