[pcie-check.sh] Incorrect command in pcie-check.sh

[bingwang-ms]

Description
pcie-check.sh is reporting errors because incorrect command.

 3253 Feb  3 23:07:17.736780 str-7260cx3-acs-2 INFO pcie-check.sh[1001]: Usage: pcieutil [OPTIONS] COMMAND [ARGS]...                                                                                   
 3254 Feb  3 23:07:17.736922 str-7260cx3-acs-2 INFO pcie-check.sh[1001]: Try "pcieutil --help" for help.
 3255 Feb  3 23:07:17.737276 str-7260cx3-acs-2 INFO pcie-check.sh[1001]: Error: No such command "pcie-check".

It's because PR #1297 updated subcommand of pcieutil, but pcie-check.sh script is not updated yet.

Steps to reproduce the issue:

1. Run pcie-check.sh

Describe the results you received:
No errors should be seen.

Describe the results you expected:
Errors are observed when running pcie-check.sh.

Additional information you deem important (e.g. issue happens only occasionally):

**Output of `show version`:**

SONiC Software Version: SONiC.HEAD.339-5c8b70ea
Distribution: Debian 10.7
Kernel: 4.19.0-9-2-amd64
Build commit: 5c8b70ea
Build date: Tue Feb  2 02:33:34 UTC 2021
Built by: johnar@jenkins-worker-22

Platform: x86_64-arista_7260cx3_64
HwSKU: Arista-7260CX3-D108C8
ASIC: broadcom
ASIC Count: 1
Serial Number: SSJ17432414
Uptime: 02:31:20 up  3:01,  1 user,  load average: 2.80, 2.95, 3.50

Docker images:
REPOSITORY                    TAG                 IMAGE ID            SIZE
docker-fpm-frr                HEAD.339-5c8b70ea   f3c9e3af45ae        427MB
docker-fpm-frr                latest              f3c9e3af45ae        427MB
docker-snmp                   HEAD.339-5c8b70ea   b400adc665fe        438MB
docker-snmp                   latest              b400adc665fe        438MB
docker-syncd-brcm             HEAD.339-5c8b70ea   3cdf85f51e97        679MB
docker-syncd-brcm             latest              3cdf85f51e97        679MB
docker-teamd                  HEAD.339-5c8b70ea   500b6b47959d        408MB
docker-teamd                  latest              500b6b47959d        408MB
docker-router-advertiser      HEAD.339-5c8b70ea   cff46295d07e        397MB
docker-router-advertiser      latest              cff46295d07e        397MB
docker-platform-monitor       HEAD.339-5c8b70ea   6b9a0beca7a2        605MB
docker-platform-monitor       latest              6b9a0beca7a2        605MB
docker-macsec                 HEAD.339-5c8b70ea   43cc58ffeecc        411MB
docker-macsec                 latest              43cc58ffeecc        411MB
docker-lldp                   HEAD.339-5c8b70ea   9e76d9751a62        437MB
docker-lldp                   latest              9e76d9751a62        437MB
docker-dhcp-relay             HEAD.339-5c8b70ea   d2f9996298b3        404MB
docker-dhcp-relay             latest              d2f9996298b3        404MB
docker-database               HEAD.339-5c8b70ea   a5e285ed330f        397MB
docker-database               latest              a5e285ed330f        397MB
docker-sonic-mgmt-framework   HEAD.339-5c8b70ea   83f9a5f79f47        615MB
docker-sonic-mgmt-framework   latest              83f9a5f79f47        615MB
docker-orchagent              HEAD.339-5c8b70ea   a6aa19dd2381        426MB
docker-orchagent              latest              a6aa19dd2381        426MB
docker-nat                    HEAD.339-5c8b70ea   8e925ec8392f        411MB
docker-nat                    latest              8e925ec8392f        411MB
docker-sonic-telemetry        HEAD.339-5c8b70ea   77e2f48bbe40        472MB
docker-sonic-telemetry        latest              77e2f48bbe40        472MB
docker-sflow                  HEAD.339-5c8b70ea   928f9bdd6490        408MB
docker-sflow                  latest              928f9bdd6490        408MB

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```