drm/msm: don't clean up priv->kms prematurely

MSM display drivers provide kms structure allocated during probe().
Don't clean up priv->kms field in case of an error. Otherwise probe
functions might fail after KMS probe deferral.

Fixes: a2ab5d5 ("drm/msm: allow passing struct msm_kms to msm_drv_probe()")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Fixes: 506efcb ("drm/msm: carve out KMS code from msm_drv.c")
Patchwork: https://patchwork.freedesktop.org/patch/590411/
Link: https://lore.kernel.org/r/20240420-mdp4-fixes-v1-1-96a70f64fa85@linaro.org

Author: lumag

drivers/gpu/drm/msm/msm_kms.c

@@ -244,7 +244,6 @@ int msm_drm_kms_init(struct device *dev, const struct drm_driver *drv)
 	ret = priv->kms_init(ddev);
 	if (ret) {
 		DRM_DEV_ERROR(dev, "failed to load kms\n");
-		priv->kms = NULL;
 		return ret;
 	}