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/drivers/partition/partition.c b/drivers/partition/partition.c
index 07869ac..630c1d8 100644
--- a/drivers/partition/partition.c
+++ b/drivers/partition/partition.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -75,7 +75,7 @@
 
 /*
  * Load GPT header and check the GPT signature.
- * If partiton numbers could be found, check & update it.
+ * If partition numbers could be found, check & update it.
  */
 static int load_gpt_header(uintptr_t image_handle)
 {