drm/panfrost: Remove unused id_mask from struct panfrost_model

The id_mask field of struct panfrost_model has never been used.

Fixes: f3ba912 ("drm/panfrost: Add initial panfrost driver")
Signed-off-by: Steven Price <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: Steven Price

drivers/gpu/drm/panfrost/panfrost_gpu.c

@@ -177,7 +177,6 @@ static void panfrost_gpu_init_quirks(struct panfrost_device *pfdev)
 struct panfrost_model {
 	const char *name;
 	u32 id;
-	u32 id_mask;
 	u64 features;
 	u64 issues;
 	struct {