gpio: ts5500: Fix Links to Technologic Systems web resources

Technologic Systems has rebranded as embeddedTS with the current
domain eventually going offline. Update web/doc URLs to correct
resource locations.

Signed-off-by: Kris Bahnsen <kris@embeddedTS.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpio-ts5500.c

@@ -11,11 +11,11 @@
  * Actually, the following platforms have DIO support:
  *
  * TS-5500:
- *   Documentation: http://wiki.embeddedarm.com/wiki/TS-5500
+ *   Documentation: https://docs.embeddedts.com/TS-5500
  *   Blocks: DIO1, DIO2 and LCD port.
  *
  * TS-5600:
- *   Documentation: http://wiki.embeddedarm.com/wiki/TS-5600
+ *   Documentation: https://docs.embeddedts.com/TS-5600
  *   Blocks: LCD port (identical to TS-5500 LCD).
  */