staging: 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/20200719123244.58718-1-grandmaster@al2klimov.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/clocking-wizard/dt-binding.txt

@@ -5,7 +5,7 @@ found in the product guide[2].
 
 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
 [2] Clocking Wizard Product Guide
-http://www.xilinx.com/support/documentation/ip_documentation/clk_wiz/v5_1/pg065-clk-wiz.pdf
+https://www.xilinx.com/support/documentation/ip_documentation/clk_wiz/v5_1/pg065-clk-wiz.pdf
 
 Required properties:
  - compatible: Must be 'xlnx,clocking-wizard'

drivers/staging/gs_fpgaboot/README

@@ -65,6 +65,6 @@ TABLE OF CONTENTS.
 6. REFERENCE
 
 	1. Xilinx APP NOTE XAPP583:
-	  http://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf
+	  https://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf
 	2. bitstream file info:
 	  http://home.earthlink.net/~davesullins/software/bitinfo.html