tools: fix typo: subsytem -> subsystem

This was found by the lintian tool (Debian package checker) during
packaging xen for Debian.

Signed-off-by: Maximilian Engelhardt <maxi@daemonizer.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

tools/include/xenctrl.h

@@ -2212,7 +2212,7 @@ int xc_memshr_domain_resume(xc_interface *xch,
  * May fail with:
  *  EINVAL if the gfn is not populated or not sharable (mmio, etc)
  *  ENOMEM if internal data structures cannot be allocated
- *  E2BIG if the page is being referenced by other subsytems (e.g. qemu)
+ *  E2BIG if the page is being referenced by other subsystems (e.g. qemu)
  *  ENOENT or EEXIST if there are internal hypervisor errors.
  */
 int xc_memshr_nominate_gfn(xc_interface *xch,

tools/misc/xen-memshare.c

@@ -30,7 +30,7 @@ static int usage(const char* prog)
     printf("  add-to-physmap <domid> <gfn> <source> <source-gfn> <source-handle>\n");
     printf("                          - Populate a page in a domain with a shared page.\n");
     printf("  debug-gfn <domid> <gfn> - Debug a particular domain and gfn.\n");
-    printf("  audit                   - Audit the sharing subsytem in Xen.\n");
+    printf("  audit                   - Audit the sharing subsystem in Xen.\n");
     return 1;
 }