drm/nouveau/secboot: clear halt interrupt after ACR is run

The halt interrupt must be cleared after ACR is run, otherwise the LS
PMU firmware will not be able to run.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/secboot/acr_r352.c

@@ -774,6 +774,8 @@ acr_r352_bootstrap(struct acr_r352 *acr, struct nvkm_secboot *sb)
 
 	nvkm_debug(&sb->subdev, "running HS load blob\n");
 	ret = sb->func->run_blob(sb, acr->load_blob);
+	/* clear halt interrupt */
+	nvkm_falcon_clear_interrupt(sb->boot_falcon, 0x10);
 	if (ret)
 		return ret;
 	nvkm_debug(&sb->subdev, "HS load blob completed\n");