docs: openrisc: Replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Link: https://lore.kernel.org/r/20200710062019.28755-1-grandmaster@al2klimov.deSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/openrisc/openrisc_port.rst

@@ -8,7 +8,7 @@ target architecture, specifically, is the 32-bit OpenRISC 1000 family (or1k).
 For information about OpenRISC processors and ongoing development:
 
 	=======		=============================
-	website		http://openrisc.io
+	website		https://openrisc.io
 	email		openrisc@lists.librecores.org
 	=======		=============================