Trivial grammar and spelling fixes

similiar -> similar
recieve -> receive
transfered -> transferred
preperation -> preparation

Most changes are in comments, one modifies a parameter name in a function
prototype.

The spelling fixes were made using codespell.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Acked-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 0e89132..d15bec1 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2493,7 +2493,7 @@
             byte (json-int)
             These are sent over the wire much more efficiently.
          - "skipped": number of skipped zero pages (json-int)
-         - "normal" : number of whole pages transfered.  I.e. they
+         - "normal" : number of whole pages transferred.  I.e. they
             were not sent as duplicate or xbzrle pages (json-int)
          - "normal-bytes" : number of bytes transferred in whole
             pages. This is just normal pages times size of one page,