Revert "Changes necessary to support SEPARATE_NOBITS_REGION feature"

This reverts commit 76d84cbc60ab3ee7bf40d53487f85ed7417bdcc3.

Change-Id: I867af7af3d9f5e568101f79b9ebea578e5cb2a4b
diff --git a/bl31/aarch64/bl31_entrypoint.S b/bl31/aarch64/bl31_entrypoint.S
index 2d672dd..665a05e 100644
--- a/bl31/aarch64/bl31_entrypoint.S
+++ b/bl31/aarch64/bl31_entrypoint.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -110,17 +110,13 @@
 	 * caches and participate in coherency.
 	 * --------------------------------------------------------------------
 	 */
-	adrp	x0, __DATA_START__
-	add	x0, x0, :lo12:__DATA_START__
-	adrp	x1, __DATA_END__
-	add	x1, x1, :lo12:__DATA_END__
+	adr	x0, __DATA_START__
+	adr	x1, __DATA_END__
 	sub	x1, x1, x0
 	bl	clean_dcache_range
 
-	adrp	x0, __BSS_START__
-	add	x0, x0, :lo12:__BSS_START__
-	adrp	x1, __BSS_END__
-	add	x1, x1, :lo12:__BSS_END__
+	adr	x0, __BSS_START__
+	adr	x1, __BSS_END__
 	sub	x1, x1, x0
 	bl	clean_dcache_range