[PATCH] drm/xe: Fix compilation without CONFIG_KUNIT

[Michal Wajdeczko <michal.wajdeczko@intel.com>]

It looks that declaration of kunit_get_current_test() was
available in xe_guc_relay.c only with CONFIG_KUNIT enabled.
If CONFIG_KUNIT is disabled we fail with:

In file included from ../include/linux/build_bug.h:5,
                 from ../include/linux/bitfield.h:10,
                 from ../drivers/gpu/drm/xe/xe_guc_relay.c:6:
../drivers/gpu/drm/xe/xe_guc_relay.c: In function ‘xe_guc_relay_process_guc2vf’:
../drivers/gpu/drm/xe/xe_guc_relay.c:863:52: error: implicit declaration of function ‘kunit_get_current_test’ [-Werror=implicit-function-declaration]
  863 |  if (unlikely(!IS_SRIOV_VF(relay_to_xe(relay)) && !kunit_get_current_test()))
      |                                                    ^~~~~~~~~~~~~~~~~~~~~~
../include/linux/compiler.h:77:42: note: in definition of macro ‘unlikely’
   77 | # define unlikely(x) __builtin_expect(!!(x), 0)
      |                                          ^

Reported-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Fixes: 9a2c2ecb1b77 ("drm/xe/guc: Introduce Relay Communication for SR-IOV")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
---
 drivers/gpu/drm/xe/xe_guc_relay.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/xe/xe_guc_relay.c b/drivers/gpu/drm/xe/xe_guc_relay.c
index b772088979bd..c0a2d8d5d3b3 100644
--- a/drivers/gpu/drm/xe/xe_guc_relay.c
+++ b/drivers/gpu/drm/xe/xe_guc_relay.c
@@ -9,6 +9,7 @@
 #include <drm/drm_managed.h>
 
 #include <kunit/static_stub.h>
+#include <kunit/test-bug.h>
 
 #include "abi/guc_actions_sriov_abi.h"
 #include "abi/guc_relay_actions_abi.h"
-- 
2.25.1