Remove duplicate symlinks

Now that the copy-firmware.sh script can create symlinks from the Link:
entries in the WHENCE file on the fly, remove the duplicate symlinks
from the filesystem.

One odd entry was intel/dsp_fw_cnl.bin which was listed both as symlink
and as a regular file. Both entries can be removed since the it's really
a symlink, so it will be recreated at installation time.

While at it, update the check_whence.py script to not look for the
existence of symlinks in the filesystem because they are created on the
fly at installation time by the copy_firmware.sh script.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -3678,7 +3678,6 @@ File: intel/dsp_fw_cnl_v1191.bin
 Version: 10.00.00.1191
 File: intel/dsp_fw_cnl_v1858.bin
 Version: 10.23.00.1858
-File: intel/dsp_fw_cnl.bin
 Link: intel/dsp_fw_cnl.bin -> dsp_fw_cnl_v1858.bin
 
 License: Redistributable. See LICENCE.adsp_sst for details

a300_pfp.fw

-qcom/a300_pfp.fw
\ No newline at end of file

a300_pm4.fw

-qcom/a300_pm4.fw
\ No newline at end of file

check_whence.py

@@ -5,11 +5,11 @@ import os, re, sys
 def list_whence():
     with open('WHENCE') as whence:
         for line in whence:
-            match = re.match(r'(?:File|Link|Source):\s*"(.*)"', line)
+            match = re.match(r'(?:File|Source):\s*"(.*)"', line)
             if match:
                 yield match.group(1)
                 continue
-            match = re.match(r'(?:File|Link|Source):\s*(\S*)', line)
+            match = re.match(r'(?:File|Source):\s*(\S*)', line)
             if match:
                 yield match.group(1)
                 continue

cxgb4/t4-config.txt

-configs/t4-config-default.txt
\ No newline at end of file

cxgb4/t4fw.bin

-t4fw-1.24.3.0.bin
\ No newline at end of file

cxgb4/t5-config.txt

-configs/t5-config-default.txt
\ No newline at end of file

cxgb4/t5fw.bin

-t5fw-1.24.3.0.bin
\ No newline at end of file

cxgb4/t6-config.txt

-configs/t6-config-default.txt
\ No newline at end of file

cxgb4/t6fw.bin

-t6fw-1.24.3.0.bin
\ No newline at end of file

intel/dsp_fw_bxtn.bin

-dsp_fw_bxtn_v3366.bin
\ No newline at end of file

intel/dsp_fw_cnl.bin

-dsp_fw_cnl_v1858.bin
\ No newline at end of file

intel/dsp_fw_glk.bin

-dsp_fw_glk_v3366.bin
\ No newline at end of file

intel/dsp_fw_kbl.bin

-dsp_fw_kbl_v3402.bin
\ No newline at end of file

intel/dsp_fw_release.bin

-dsp_fw_release_v3402.bin
\ No newline at end of file

intel/ipu3-fw.bin

-irci_irci_ecr-master_20161208_0213_20170112_1500.bin
\ No newline at end of file

libertas/sd8688.bin

-../mrvl/sd8688.bin
\ No newline at end of file

libertas/sd8688_helper.bin

-../mrvl/sd8688_helper.bin
\ No newline at end of file

netronome/flower/nic_AMDA0058-0011_1x100.nffw

-nic_AMDA0058.nffw
\ No newline at end of file

netronome/flower/nic_AMDA0058-0011_2x40.nffw

-nic_AMDA0058.nffw
\ No newline at end of file