Revert "feat(sgi): add page table translation entry for secure uart"

Revert submission 14286-uart_segregation

Reason for revert: Need to wait for companion patches in CI and UEFI/Linux to be upstreamed.

Reverted Changes:
I8574b31d5:feat(sgi): add page table translation entry for se...
I8896ae05e:feat(sgi): route TF-A logs via secure uart
I39170848e:feat(sgi): deviate from arm css common uart relate...

Change-Id: I9bec02496f826e184c6efa643f869b2eb3b52539
diff --git a/plat/arm/css/sgi/sgi_plat_v2.c b/plat/arm/css/sgi/sgi_plat_v2.c
index cef5345..1a2a966 100644
--- a/plat/arm/css/sgi/sgi_plat_v2.c
+++ b/plat/arm/css/sgi/sgi_plat_v2.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -83,7 +83,6 @@
 const mmap_region_t plat_arm_secure_partition_mmap[] = {
 	PLAT_ARM_SECURE_MAP_SYSTEMREG,
 	PLAT_ARM_SECURE_MAP_NOR2,
-	SOC_PLATFORM_SECURE_UART,
 	SOC_PLATFORM_PERIPH_MAP_DEVICE_USER,
 	ARM_SP_IMAGE_MMAP,
 	ARM_SP_IMAGE_NS_BUF_MMAP,