Correct typographical errors

Corrects typos in core code, documentation files, drivers, Arm
platforms and services.

None of the corrections affect code; changes are limited to comments
and other documentation.

Change-Id: I5c1027b06ef149864f315ccc0ea473e2a16bfd1d
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
diff --git a/common/backtrace/backtrace.c b/common/backtrace/backtrace.c
index bf60a08..ecc65c9 100644
--- a/common/backtrace/backtrace.c
+++ b/common/backtrace/backtrace.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -231,7 +231,7 @@
  * Usage of the trace: addr2line can be used to map the addresses to function
  * and source code location when given the ELF file compiled with debug
  * information. The "-i" flag is highly recommended to improve display of
- * inlined function. The *.dump files generated when buildidng each image can
+ * inlined function. The *.dump files generated when building each image can
  * also be used.
  *
  * WARNING: In case of corrupted stack, this function could display security