unix: change Landlock type aliases to new types

Type aliases were introduced in CL 348349 and I did not notice it during
the review process. The typical convention is to create new types instead.

Change-Id: I4789cfc836b8612abfd791451edfd619c93d23df
Reviewed-on: https://go-review.googlesource.com/c/sys/+/348450
Trust: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
diff --git a/unix/linux/types.go b/unix/linux/types.go
index 56012b8..7d76e5c 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -3822,9 +3822,9 @@
 
 // Landlock
 
-type LandlockRulesetAttr = C.struct_landlock_ruleset_attr
+type LandlockRulesetAttr C.struct_landlock_ruleset_attr
 
-type LandlockPathBeneathAttr = C.struct_landlock_path_beneath_attr
+type LandlockPathBeneathAttr C.struct_landlock_path_beneath_attr
 
 const (
 	LANDLOCK_RULE_PATH_BENEATH = C.LANDLOCK_RULE_PATH_BENEATH
diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index fffc9e3..06dcd78 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -3924,11 +3924,11 @@
 	NFC_SDP_ATTR_SAP                  = 0x2
 )
 
-type LandlockRulesetAttr = struct {
+type LandlockRulesetAttr struct {
 	Access_fs uint64
 }
 
-type LandlockPathBeneathAttr = struct {
+type LandlockPathBeneathAttr struct {
 	Allowed_access uint64
 	Parent_fd      int32
 }