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.
 
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