drm/xe/vf: Revert logic of vf.migration.enabled

Convert `enabled` property into `disabled`.

Reviewed-by: Michal Wajdeczko <[e-mail]>
Cc: Michal Wajdeczko <[e-mail]>
Signed-off-by: Tomasz Lis <[e-mail]>
Suggested-by: Michal Wajdeczko <[e-mail]>
Signed-off-by: Michal Wajdeczko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/xe/xe_sriov_vf.c

···
 bool xe_sriov_vf_migration_supported(struct xe_device *xe)
 {
 	xe_assert(xe, IS_SRIOV_VF(xe));
-	return xe->sriov.vf.migration.enabled;
+	return !xe->sriov.vf.migration.disabled;
 }
 
 static void vf_disable_migration(struct xe_device *xe, const char *fmt, ...)
···
 	xe_sriov_notice(xe, "migration disabled: %pV\n", &vaf);
 	va_end(va_args);
 
-	xe->sriov.vf.migration.enabled = false;
+	xe->sriov.vf.migration.disabled = true;
 }
 
 static void vf_migration_init_early(struct xe_device *xe)
···
 						    "CCS migration requires GuC ABI >= 1.23 but only %u.%u found",
 						    guc_version.major, guc_version.minor);
 	}
-
-	xe->sriov.vf.migration.enabled = true;
-	xe_sriov_dbg(xe, "migration support enabled\n");
 }
 
 /**

drivers/gpu/drm/xe/xe_sriov_vf_types.h

···
 	/** @migration: VF Migration state data */
 	struct {
 		/**
-		 * @migration.enabled: flag indicating if migration support
-		 * was enabled or not due to missing prerequisites
+		 * @migration.disabled: flag indicating if migration support
+		 * was turned off due to missing prerequisites
 		 */
-		bool enabled;
+		bool disabled;
 	} migration;
 
 	/** @ccs: VF CCS state data */