Restyle and add some description for the new parameters

scripts/examples/gn_efr32_example.sh

@@ -82,6 +82,10 @@ if [ "$#" == "0" ]; then
  enable_sleepy_device
  Enable Sleepy end device. (Default false)
  Must also set chip_openthread_ftd=false
+ sl_matter_version_str
+ Set a Matter sotfware version string for the Silabs examples
+ Used and formatted by default in this script.
+ To skip that formatting or use your own version string use --skip_versioning
  use_rs911x
  Build wifi example with extension board rs911x. (Default false)
  use_wf200
@@ -105,6 +109,9 @@ if [ "$#" == "0" ]; then
  enable Addition data advertissing and rotating device ID
  --use_ot_lib
  use the silabs openthread library
+ --skip_versioning
+ Skip the silabs formating for the Matter software version string
+ Currently : v1.0-<branchName>-<ShortCommitSha>
  "
 elif [ "$#" -lt "2" ]; then
  echo "Invalid number of arguments
@@ -164,7 +171,7 @@ else
  optArgs+="use_silabs_thread_lib=true chip_openthread_target=$SILABS_THREAD_TARGET openthread_external_platform=\"""\" use_thread_coap_lib=true "
  shift
  ;;
- --skip_silabs_version)
+ --skip_versioning)
  USE_SILABS_VERSIONING=false
  shift
  ;;
@@ -189,7 +196,7 @@ else
  ShortCommitSha=$(git describe --always --dirty)
  branchName=$(git rev-parse --abbrev-ref HEAD)
  optArgs+="sl_matter_version_str=\"v1.0-$branchName-$ShortCommitSha\" "
- }  &> /dev/null
+ } &>/dev/null
  fi
 
  BUILD_DIR=$OUTDIR/$SILABS_BOARD