DynamicTablesPkg: Add Aml NameUnicodeString API

Add API to generate a Name that contains a Unicode string buffer.

Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h

@@ -958,6 +958,37 @@ AmlCodeGenNameResourceTemplate (
   OUT       AML_OBJECT_NODE_HANDLE  *NewObjectNode   OPTIONAL
   );
 
+/** AML code generation for a Name object node, containing a String.
+
+  AmlCodeGenNameUnicodeString ("_STR", L"String", ParentNode, NewObjectNode) is
+  equivalent of the following ASL code:
+    Name(_STR, Unicode ("String"))
+
+  @ingroup CodeGenApis
+
+  @param  [in] NameString     The new variable name.
+                              Must be a NULL-terminated ASL NameString
+                              e.g.: "DEV0", "DV15.DEV0", etc.
+                              The input string is copied.
+  @param [in]  String         NULL terminated Unicode String to associate to the
+                              NameString.
+  @param [in]  ParentNode     If provided, set ParentNode as the parent
+                              of the node created.
+  @param [out] NewObjectNode  If success, contains the created node.
+
+  @retval EFI_SUCCESS             Success.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_OUT_OF_RESOURCES    Failed to allocate memory.
+**/
+EFI_STATUS
+EFIAPI
+AmlCodeGenNameUnicodeString (
+  IN  CONST CHAR8                   *NameString,
+  IN        CHAR16                  *String,
+  IN        AML_NODE_HANDLE         ParentNode      OPTIONAL,
+  OUT       AML_OBJECT_NODE_HANDLE  *NewObjectNode   OPTIONAL
+  );
+
 /** Add a _PRT entry.
 
   AmlCodeGenPrtEntry (0x0FFFF, 0, "LNKA", 0, PrtNameNode) is