match_string() returns the index of an array for a matching string,
which can be used intead of open coded variant.

Cc: Ben Skeggs <bske...@redhat.com>
Cc: David Airlie <airl...@linux.ie>
Cc: dri-de...@lists.freedesktop.org
Cc: nouv...@lists.freedesktop.org
Signed-off-by: Yisheng Xie <xieyishe...@huawei.com>
---
 drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c 
b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
index 6d99f11..a6b4c4a 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
@@ -644,14 +644,11 @@ static int nv17_tv_create_resources(struct drm_encoder 
*encoder,
        int i;
 
        if (nouveau_tv_norm) {
-               for (i = 0; i < num_tv_norms; i++) {
-                       if (!strcmp(nv17_tv_norm_names[i], nouveau_tv_norm)) {
-                               tv_enc->tv_norm = i;
-                               break;
-                       }
-               }
-
-               if (i == num_tv_norms)
+               i = match_string(nv17_tv_norm_names,
+                                num_tv_norms, nouveau_tv_norm);
+               if (i >= 0)
+                       tv_enc->tv_norm = i;
+               else
                        NV_WARN(drm, "Invalid TV norm setting \"%s\"\n",
                                nouveau_tv_norm);
        }
-- 
1.7.12.4

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