Fix new typos in comments (found by codespell)

arbitary -> arbitrary
basicly -> basically

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/xen-hvm.c b/xen-hvm.c
index c928b36..a2486cf 100644
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -165,7 +165,7 @@
                                                    PC_MACHINE_MAX_RAM_BELOW_4G,
                                                    &error_abort);
 
-    /* Handle the machine opt max-ram-below-4g.  It is basicly doing
+    /* Handle the machine opt max-ram-below-4g.  It is basically doing
      * min(xen limit, user limit).
      */
     if (HVM_BELOW_4G_RAM_END <= user_lowmem) {