linux-firmware: move i915 firmware symlinks to WHENCE

There's a handful of firmware symlinks in the i915 firmware
directory, move the creation of these to the WHENCE file.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
CC: José Roberto de Souza <jose.souza@intel.com>
CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
CC: Anusha Srivatsa <anusha.srivatsa@intel.com>
CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
CC: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -4012,15 +4012,15 @@ Driver: i915 -- Intel Integrated Graphics driver
 File: i915/skl_dmc_ver1_23.bin
 File: i915/skl_dmc_ver1_26.bin
 File: i915/skl_dmc_ver1_27.bin
-File: i915/skl_dmc_ver1.bin
+Link: i915/skl_dmc_ver1.bin -> skl_dmc_ver1_26.bin
 Version: DMC API/ABI ver 1 - release 27 for Skylake
 
 File: i915/bxt_dmc_ver1_07.bin
-File: i915/bxt_dmc_ver1.bin
+Link: i915/bxt_dmc_ver1.bin -> bxt_dmc_ver1_07.bin
 Version: DMC API/ABI ver 1 - release 07 for Broxton
 
 File: i915/kbl_dmc_ver1_01.bin
-File: i915/kbl_dmc_ver1.bin
+Link: i915/kbl_dmc_ver1.bin -> kbl_dmc_ver1_01.bin
 Version: DMC API/ABI ver 1 - release 01 for Kabylake
 
 File: i915/kbl_dmc_ver1_04.bin
@@ -4034,7 +4034,7 @@ File: i915/skl_guc_ver4.bin
 Version: Guc API/ABI ver 4 - release 3 for Skylake
 
 File: i915/skl_guc_ver6_1.bin
-File: i915/skl_guc_ver6.bin
+Link: i915/skl_guc_ver6.bin -> skl_guc_ver6_1.bin
 Version: Guc API/ABI ver 6 - release 1 for Skylake
 
 File: i915/skl_guc_ver9_33.bin

i915/bxt_dmc_ver1.bin

@@ -1 +0,0 @@
-bxt_dmc_ver1_07.bin

i915/kbl_dmc_ver1.bin

@@ -1 +0,0 @@
-kbl_dmc_ver1_01.bin

i915/skl_dmc_ver1.bin

@@ -1 +0,0 @@
-skl_dmc_ver1_26.bin

i915/skl_guc_ver6.bin

@@ -1 +0,0 @@
-skl_guc_ver6_1.bin