Replace HTTP links with HTTPS ones: GRETH 10/100/1G Ethernet MAC device driver

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 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>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aeroflex/greth.c

@@ -8,7 +8,7 @@
  * available in the GRLIB VHDL IP core library.
  *
  * Full documentation of both cores can be found here:
- * http://www.gaisler.com/products/grlib/grip.pdf
+ * https://www.gaisler.com/products/grlib/grip.pdf
  *
  * The Gigabit version supports scatter/gather DMA, any alignment of
  * buffers and checksum offloading.