refactor: combine ld and sd io into ls io

Author: maksyuki

rtl/tc_l2/src/main/scala/port/LDIO.scala

@@ -3,9 +3,16 @@ package treecorel2
 import chisel3._
 import chisel3.util._
 
+class LDIO extends Bundle {
+  val en   = Output(Bool())
+  val addr = Output(UInt(64.W))
+  val data = Input(UInt(64.W))
+  val size = Output(UInt(3.W))
+}
+
 class SDIO extends Bundle {
   val en   = Output(Bool())
   val addr = Output(UInt(64.W))
   val data = Output(UInt(64.W))
   val mask = Output(UInt(8.W))
-}
+}