Revert "plat/arm: Add support for SEPARATE_NOBITS_REGION"

This reverts commit d433bbdd459c222e5bf5ca87319807465b246d8c.

Change-Id: I46c69dce704a1ce1b50452dd4d62425c4a67f7f0
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index ab33e1d..9d4f05e 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -125,23 +125,6 @@
 # mapping the former as executable and the latter as execute-never.
 SEPARATE_CODE_AND_RODATA	:=	1
 
-# On ARM platforms, disable SEPARATE_NOBITS_REGION by default. Both PROGBITS
-# and NOBITS sections of BL31 image are adjacent to each other and loaded
-# into Trusted SRAM.
-SEPARATE_NOBITS_REGION		:=	0
-
-# In order to support SEPARATE_NOBITS_REGION for Arm platforms, we need to load
-# BL31 PROGBITS into secure DRAM space and BL31 NOBITS into SRAM. Hence mandate
-# the build to require that ARM_BL31_IN_DRAM is enabled as well.
-ifeq ($(SEPARATE_NOBITS_REGION),1)
-    ifneq ($(ARM_BL31_IN_DRAM),1)
-         $(error For SEPARATE_NOBITS_REGION, ARM_BL31_IN_DRAM must be enabled)
-    endif
-    ifneq ($(RECLAIM_INIT_CODE),0)
-          $(error For SEPARATE_NOBITS_REGION, RECLAIM_INIT_CODE cannot be supported)
-    endif
-endif
-
 # Disable ARM Cryptocell by default
 ARM_CRYPTOCELL_INTEG		:=	0
 $(eval $(call assert_boolean,ARM_CRYPTOCELL_INTEG))