drm/i915/firmware: Correct URL for firmware

Replace 01.org URL with upstream linux-firmware repo URL.
We no longer release firmware to 01.org.
linux-firmware.git is the ultimate place to find
the i915 firmwares.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NAnusha Srivatsa <anusha.srivatsa@intel.com>
Acked-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1525129168-529-1-git-send-email-anusha.srivatsa@intel.com

drivers/gpu/drm/i915/intel_uc_fw.h

@@ -30,7 +30,7 @@ struct drm_i915_private;
 struct i915_vma;
 
 /* Home of GuC, HuC and DMC firmwares */
-#define INTEL_UC_FIRMWARE_URL "https://01.org/linuxgraphics/downloads/firmware"
+#define INTEL_UC_FIRMWARE_URL "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915"
 
 enum intel_uc_fw_status {
 	INTEL_UC_FIRMWARE_FAIL = -1,