[PATCH] drm/xe: Fix warning on unreachable statement

[Lucas De Marchi]

eu_type_to_str() relies on -Wswitch to warn (and -Werror) to make sure
it handles all enum values. However it's perfectly legal to pass an int
to that function so in the end that function may happen to return
nothing. A smart compiler could notice eu_type is never assigned to
anything other than those values.

Trying to reproduce this issue, none of gcc-9, gcc-10 and gcc-13
triggered for me, but this was reported in a different system with
gcc-10:

	drivers/gpu/drm/xe/xe.o: warning: objtool: xe_gt_topology_dump() falls through to next function xe_gt_topology_init()

Since that is not really possible, just take the simple approach and
return NULL.

Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_gt_topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_gt_topology.c b/drivers/gpu/drm/xe/xe_gt_topology.c
index 5a1559edf3e9..0662f71c6ede 100644
--- a/drivers/gpu/drm/xe/xe_gt_topology.c
+++ b/drivers/gpu/drm/xe/xe_gt_topology.c
@@ -233,7 +233,7 @@ static const char *eu_type_to_str(enum xe_gt_eu_type eu_type)
 		return "simd8";
 	}
 
-	unreachable();
+	return NULL;
 }
 
 void
-- 
2.43.0