Fix typos and misspellings

Fix a number of typos and misspellings in TF-A
documentation and comments.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
Change-Id: I34c5a28c3af15f28d1ccada4d9866aee6af136ee
diff --git a/docs/components/psa-ffa-manifest-binding.rst b/docs/components/psa-ffa-manifest-binding.rst
index 09894ae..af79074 100644
--- a/docs/components/psa-ffa-manifest-binding.rst
+++ b/docs/components/psa-ffa-manifest-binding.rst
@@ -13,7 +13,7 @@
 - compatible [mandatory]
    - value type: <string>
    - Must be the string "arm,ffa-manifest-X.Y" which specifies the major and
-     minor versions fo the device tree binding for the FFA manifest represented
+     minor versions of the device tree binding for the FFA manifest represented
      by this node. The minor number is incremented if the binding changes in a
      backwards compatible manner.
 
@@ -240,7 +240,7 @@
 - exclusive-access
    - value type: <empty>
    - Presence of this field implies that this endpoint must be granted exclusive
-     access and ownership of this devices's MMIO region.
+     access and ownership of this device's MMIO region.
 
 --------------
 
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index 19e26e4..d063ec7 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -116,7 +116,7 @@
    by ``plat/common/aarch64/platform_mp_stack.S`` and
    ``plat/common/aarch64/platform_up_stack.S``.
 
--  **define : CACHE_WRITEBACK_GRANULE**
+-  **#define : CACHE_WRITEBACK_GRANULE**
 
    Defines the size in bits of the largest cache line across all the cache
    levels in the platform.
diff --git a/docs/process/coding-style.rst b/docs/process/coding-style.rst
index 94fd85e..be13b14 100644
--- a/docs/process/coding-style.rst
+++ b/docs/process/coding-style.rst
@@ -101,7 +101,7 @@
 parentheses.
 
 Control statements (``if``, ``for``, ``switch``, ``while``, etc) must be
-separated from the following open paranthesis by a single space. The previous
+separated from the following open parenthesis by a single space. The previous
 example illustrates this for an ``if`` statement.
 
 Line Length
diff --git a/plat/common/aarch64/platform_mp_stack.S b/plat/common/aarch64/platform_mp_stack.S
index c34a4cf..c0668ea 100644
--- a/plat/common/aarch64/platform_mp_stack.S
+++ b/plat/common/aarch64/platform_mp_stack.S
@@ -14,7 +14,7 @@
 	.weak	plat_set_my_stack
 
 	/* ---------------------------------------------------------------------
-	 * When the compatility layer is disabled, the platform APIs
+	 * When the compatibility layer is disabled, the platform APIs
 	 * plat_get_my_stack() and plat_set_my_stack() are supported by the
 	 * platform and the previous APIs platform_get_stack() and
 	 * platform_set_stack() are defined in terms of new APIs making use of