Use more secure HTTPS URLs for coreboot sites

The coreboot sites support HTTPS, and requests over HTTP with SSL are
also redirected. So use the more secure URLs, which also saves a
request most of the times, as nothing needs to be redirected.

Run the command below to replace all occurences.

```
$ git grep -l -E 'http://(www.|review.|)coreboot.org'
| xargs sed -i 's,http://\(.*\)coreboot.org,https://\1coreboot.org,g'
```

Change-Id: If53f8b66f1ac72fb1a38fa392b26eade9963c369
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://review.coreboot.org/20034
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/superiotool/README

@@ -18,7 +18,7 @@ for details on coreboot), but it may also be useful for other things.
 Installation
 ------------
 
- $ git clone http://review.coreboot.org/p/coreboot.git
+ $ git clone https://review.coreboot.org/p/coreboot.git
 
  $ cd coreboot/util/superiotool
 
@@ -53,23 +53,23 @@ Typical usage of superiotool:
 Supported Super I/O Chips
 -------------------------
 
-Please see http://coreboot.org/Superiotool#Supported_devices, or type
+Please see https://coreboot.org/Superiotool#Supported_devices, or type
 
  $ superiotool -l
 
 There's also a collection of sample register dumps from various Super I/O
 chips on that web page. Please send further register dumps (either from a
 proprietary BIOS and/or from coreboot) to the coreboot mailing list
-(http://coreboot.org/Mailinglist).
+(https://coreboot.org/Mailinglist).
 
 
 Website and Mailing List
 ------------------------
 
-The main website is http://coreboot.org/Superiotool.
+The main website is https://coreboot.org/Superiotool.
 
 For additional information, patches, and discussions, please join the
-coreboot mailing list at http://coreboot.org/Mailinglist, where most
+coreboot mailing list at https://coreboot.org/Mailinglist, where most
 superiotool developers are subscribed.