Add multi-drivers-switch param to pxeboot cfg

Accept and apply intel driver ver parameter to pxeboot conf file
for nodes to be installed (include reinstall and upgrade).

TCs:
    Observed the pxeboot cfg file for a new host is configured
    with param multi-drivers-switch=<ver from service parameter>

Story: 2010651
Task: 48276

Signed-off-by: Bin Qian <bin.qian@windriver.com>
Change-Id: I6aebff98a5bb831de82f6da07ac53978b17f8caf

installer/pxe-network-installer/pxe-network-installer/pxeboot-update.sh

@@ -32,6 +32,7 @@ Arguments:
     -T <tboot value>      : Specify whether or not to use tboot (optional)
     -k <kernel args>      : Specify any extra kernel boot arguments (optional)
     -l <base url>         : Specify installer base URL
+    -v <intel driver ver> : Specify intel driver ver to load
     -d                    : Update Debian grub menus ; rather than centos menus
 
 EOF
@@ -71,7 +72,7 @@ parms=$@
 logger -t $0 " $parms"
 debian_menus=false
 
-while getopts "i:o:tgc:b:r:H:u:s:T:k:l:h:d" opt
+while getopts "i:o:tgc:b:r:H:u:s:T:k:l:v:h:d" opt
 do
     case $opt in
         i)
@@ -121,6 +122,9 @@ do
         l)
             base_url=$OPTARG
             ;;
+        v)
+            driver_ver=$OPTARG
+            ;;
         h)
             usage
             exit 1
@@ -200,6 +204,10 @@ if [ -n "$kernal_extra_args" ]; then
     APPEND_OPTIONS="$APPEND_OPTIONS $kernal_extra_args"
 fi
 
+if [ -n "$driver_ver" ]; then
+    APPEND_OPTIONS="$APPEND_OPTIONS multi-drivers-switch=$driver_ver"
+fi
+
 BASE_URL=$base_url
 
 generate_config $input_file $output_file