CR-1219148 Fix --pmode in xrt-smi configure help menu

[rchane]

Problem solved by the commit

https://jira.xilinx.com/browse/CR-1219148

Bug / issue (if any) fixed, which PR introduced the bug, how it was discovered

During internal testing, found [--pmode] option in brackets for xrt-smi configure help menu was misleading, as it is a required option.

How problem was solved, alternative solutions (if any) and why they were rejected

Removed the square brackets from formatting string.

Risks (if any) associated the changes in the commit

N/A

What has been tested and how, request additional testing if necessary

Tested on Linux and STX/MCDM, verified that help menus for examine and validate were not broken in the process.

C:\Users\rchane\Desktop\xrt>xrt-smi configure --help

COMMAND: configure

DESCRIPTION: Device and host configuration.

USAGE: xrt-smi configure --pmode [-h] [-d arg]

OPTIONS:
  -d, --device       - The Bus:Device.Function (e.g., 0000:d8:00.0) device of interest
  -h, --help         - Help to use this sub-command
  --pmode            - Modes: default, powersaver, balanced, performance, turbo


GLOBAL OPTIONS:
  --verbose          - Turn on verbosity
  --batch            - Enable batch mode (disables escape characters)
  --force            - When possible, force an operation

Documentation impact (if any)

N/A