refactor(cm): move EL3 registers to global context

Currently, EL3 context registers are duplicated per-world per-cpu.
Some registers have the same value across all CPUs, so this patch
moves these registers out into a per-world context to reduce
memory usage.

Change-Id: I91294e3d5f4af21a58c23599af2bdbd2a747c54a
Signed-off-by: Elizabeth Ho <elizabeth.ho@arm.com>
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
diff --git a/bl31/aarch64/runtime_exceptions.S b/bl31/aarch64/runtime_exceptions.S
index 7336b91..8298696 100644
--- a/bl31/aarch64/runtime_exceptions.S
+++ b/bl31/aarch64/runtime_exceptions.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2023, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -401,7 +401,7 @@
 
 #if ENABLE_RME
 	/* Copy SCR_EL3.NSE bit to the flag to indicate caller's security */
-	ubfx	x7, x18, #SCR_NSE_SHIFT, 1
+	ubfx	x7, x18, #SCR_NSE_SHIFT, #1
 
 	/*
 	 * Shift copied SCR_EL3.NSE bit by 5 to create space for