drm/amd/display: add missing mod_vmid destructor

mod_vmid is missing a destructor.
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/modules/inc/mod_vmid.h

@@ -41,4 +41,6 @@ struct mod_vmid *mod_vmid_create(
 		unsigned int num_vmid,
 		struct dc_virtual_addr_space_config *va_config);
 
+void mod_vmid_destroy(struct mod_vmid *mod_vmid);
+
 #endif /* MOD_VMID_H_ */

drivers/gpu/drm/amd/display/modules/vmid/vmid.c

@@ -156,3 +156,12 @@ struct mod_vmid *mod_vmid_create(
 fail_dc_null:
 	return NULL;
 }
+
+void mod_vmid_destroy(struct mod_vmid *mod_vmid)
+{
+	if (mod_vmid != NULL) {
+		struct core_vmid *core_vmid = MOD_VMID_TO_CORE(mod_vmid);
+
+		kfree(core_vmid);
+	}
+}