fix(arm): increase ARM_BL_REGIONS count

On RME-enabled platforms, it is currently not possible to incorporate
mapping of all bl_regions specified in bl31 setup[1] with the
ARM_BL_REGIONS macro defined to 6. Hence increased its count to 7.

[1]: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/
plat/arm/common/arm_bl31_setup.c#n380

Change-Id: Ieaa97f026ab2ae6eae22442595aa4122ba0a13c4
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

include/plat/arm/common/arm_def.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -381,7 +381,7 @@
  * The max number of regions like RO(code), coherent and data required by
  * different BL stages which need to be mapped in the MMU.
  */
-#define ARM_BL_REGIONS			6
+#define ARM_BL_REGIONS			7
 
 #define MAX_MMAP_REGIONS		(PLAT_ARM_MMAP_ENTRIES +	\
 					 ARM_BL_REGIONS)