drm, ipu-v3: use https://linuxtv.org for LinuxTV URL

While https was always supported on linuxtv.org, only in
Dec 3 2015 the website is using valid certificates.

As we're planning to drop pure http support on some
future, change the references at DRM include and at
the ipu-v3 driver to point to the https://linuxtv.org
URL instead.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/gpu/ipu-v3/ipu-cpmem.c

@@ -161,7 +161,7 @@ static u32 ipu_ch_param_read_field(struct ipuv3_channel *ch, u32 wbs)
  * The DRM pixel formats and IPU internal representation are ordered the other
  * way around, with the first named component ordered at the most significant
  * bits. Further, V4L2 formats are not well defined:
- *     http://linuxtv.org/downloads/v4l-dvb-apis/packed-rgb.html
+ *     https://linuxtv.org/downloads/v4l-dvb-apis/packed-rgb.html
  * We choose the interpretation which matches GStreamer behavior.
  */
 static int v4l2_pix_fmt_to_drm_fourcc(u32 pixelformat)

include/uapi/drm/drm_fourcc.h

@@ -225,7 +225,7 @@
  * - multiple of 128 pixels for the width
  * - multiple of  32 pixels for the height
  *
- * For more information: see http://linuxtv.org/downloads/v4l-dvb-apis/re32.html
+ * For more information: see https://linuxtv.org/downloads/v4l-dvb-apis/re32.html
  */
 #define DRM_FORMAT_MOD_SAMSUNG_64_32_TILE	fourcc_mod_code(SAMSUNG, 1)