Fix typos and misspellings

Fix various typos and misspellings. The bulk of these were found with
codespell.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index d7da850..3b5c536 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -120,7 +120,7 @@
         return;
     }
 
-    /* succeded */
+    /* succeeded */
 }
 
 int64_t qmp_guest_get_time(Error **errp)