build: always prefix section names with `.`

Some of our specialized sections are not prefixed with the conventional
period. The compiler uses input section names to derive certain other
section names (e.g. `.rela.text`, `.relacpu_ops`), and these can be
difficult to select in linker scripts when there is a lack of a
delimiter.

This change introduces the period prefix to all specialized section
names.

BREAKING-CHANGE: All input and output linker section names have been
 prefixed with the period character, e.g. `cpu_ops` -> `.cpu_ops`.

Change-Id: I51c13c5266d5975fbd944ef4961328e72f82fc1c
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/plat/hisilicon/hikey960/include/plat.ld.S b/plat/hisilicon/hikey960/include/plat.ld.S
index 0cc25cd..f8bd376 100644
--- a/plat/hisilicon/hikey960/include/plat.ld.S
+++ b/plat/hisilicon/hikey960/include/plat.ld.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -14,8 +14,8 @@
 
 SECTIONS
 {
-	ram2_region (NOLOAD) : {
-	*(ram2_region)
+	.ram2_region (NOLOAD) : {
+	*(.ram2_region)
 	}>RAM2
 }