[prim] Fix various comments
Remove wrong comments from primitives, add the common TODO comment to
all abstract primitives.
No functional changes.
diff --git a/hw/ip/prim/abstract/prim_clock_gating.sv b/hw/ip/prim/abstract/prim_clock_gating.sv
index 4765c4a..9424d9a 100644
--- a/hw/ip/prim/abstract/prim_clock_gating.sv
+++ b/hw/ip/prim/abstract/prim_clock_gating.sv
@@ -1,8 +1,6 @@
// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
-//
-// Common Library: Clock Gating cell
// TODO: This module is a hard-coded stopgap to select an implementation of an
// "abstract module". This module is to be replaced by generated code.
diff --git a/hw/ip/prim/abstract/prim_pad_wrapper.sv b/hw/ip/prim/abstract/prim_pad_wrapper.sv
index b8dc6e8..e18b7e3 100644
--- a/hw/ip/prim/abstract/prim_pad_wrapper.sv
+++ b/hw/ip/prim/abstract/prim_pad_wrapper.sv
@@ -5,7 +5,6 @@
// TODO: This module is a hard-coded stopgap to select an implementation of an
// "abstract module". This module is to be replaced by generated code.
-// prim_pad_wrapper using the generic implementation
module prim_pad_wrapper #(
parameter Impl = "generic",
parameter int unsigned AttrDw = 6
diff --git a/hw/ip/prim/abstract/prim_ram_2p.sv b/hw/ip/prim/abstract/prim_ram_2p.sv
index de79252..46a74f6 100644
--- a/hw/ip/prim/abstract/prim_ram_2p.sv
+++ b/hw/ip/prim/abstract/prim_ram_2p.sv
@@ -5,7 +5,6 @@
// TODO: This module is a hard-coded stopgap to select an implementation of an
// "abstract module". This module is to be replaced by generated code.
-// prim_ram_2p using the generic implementation
module prim_ram_2p #(
parameter int Width = 32, // bit
parameter int Depth = 128,
diff --git a/hw/ip/prim/abstract/prim_rom.sv b/hw/ip/prim/abstract/prim_rom.sv
index b0adecc..8f73e19 100644
--- a/hw/ip/prim/abstract/prim_rom.sv
+++ b/hw/ip/prim/abstract/prim_rom.sv
@@ -2,6 +2,9 @@
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
+// TODO: This module is a hard-coded stopgap to select an implementation of an
+// "abstract module". This module is to be replaced by generated code.
+
module prim_rom #(
parameter int Width = 32,
parameter int Depth = 2048, // 8kB default
