[generate_dump]: Enhance show techsupport for Marvell platform (#2676)

#### What I did
Added support for marvell sdk commands in "show techsupport". 

#### How I did it
Modified the generate_dump script, to add marvell sdk commands under a proper platform check.

#### How to verify it
Verified the change by running "show techsupport" command and check all the newly added marvel sdk commands are collecting the correct information.

scripts/generate_dump

@@ -1157,6 +1157,67 @@ collect_mellanox_dfw_dumps() {
     done
 }
 
+###############################################################################
+# Runs a given marvellcmd command in all namesapces in case of multi ASIC platform
+# Globals:
+#  NUM_ASICS
+# Arguments:
+#  cmd: The command to run. Make sure that arguments with spaces have quotes
+#  filename: the filename to save the output as in $BASE/dump
+#  do_gzip: (OPTIONAL) true or false. Should the output be gzipped
+# Returns:
+#  None
+###############################################################################
+save_marvellcmd() {
+    trap 'handle_error $? $LINENO' ERR
+
+    mkdir -p $LOGDIR/sdkdump
+    local cmd="docker exec syncd mrvlcmd -c \"$1\""
+    save_cmd "$cmd" "sdkdump/$2"
+}
+
+###############################################################################
+# Collect Marvell specific information
+# Globals:
+#  None
+# Arguments:
+#  None
+# Returns:
+#  None
+###############################################################################
+collect_marvell() {
+    trap 'handle_error $? $LINENO' ERR
+
+    save_marvellcmd "show version" "CPSS_version"
+    save_marvellcmd "debug-mode;xps-api call xpsDataIntegrityDumpSerInfo all" "SER_table"
+    save_marvellcmd "show traffic cpu rx statistic device 0" "CPU_stat"
+    save_marvellcmd "show interfaces status all" "INTERFACE_config"
+    save_marvellcmd "show port monitor" "PORT_mirror"
+    save_marvellcmd "show vlan device 0" "VLAN_table"
+    save_marvellcmd "show ip route device 0" "IP_route"
+    save_marvellcmd "show ipv6 route device 0" "IPV6_route"
+    save_marvellcmd "show ip route_fdb device 0" "IP_forward_route"
+    save_marvellcmd "show ipv6 route_fdb device 0" "IPV6_forward_route"
+    save_marvellcmd "show ip next-hop device 0" "NH_table"
+    save_marvellcmd "show mac address-table device 0" "MAC_forward"
+    save_marvellcmd "show mac address-table count device 0" "MAC_count"
+    save_marvellcmd "show tail-drop-allocated buffers all" "Tail_drop"
+    save_marvellcmd "show policy device 0" "POLICER_table"
+    save_marvellcmd "show system policy-tcam utilization device 0" "Policy_count"
+    save_marvellcmd "show access-list device 0 pcl-id 0 format ingress_udb_30" "UDB30_acl"
+    save_marvellcmd "show access-list device 0 pcl-id 0 format ingress_udb_60" "UDB60_acl"
+    save_marvellcmd "debug-mode;show drop counters 0" "Drop_count"
+    save_marvellcmd "debug-mode;dump all registers" "REGISTER_table"
+    save_marvellcmd "debug-mode;dump all tables0" "HW_table_0"
+    save_marvellcmd "debug-mode;dump all tables1" "HW_table_1"
+    save_marvellcmd "debug-mode;dump all tables2" "HW_table_2"
+    save_marvellcmd "debug-mode;dump all tables3" "HW_table_3"
+    save_marvellcmd "debug-mode;dump all tables4" "HW_table_4"
+    save_marvellcmd "debug-mode;dump all tables5" "HW_table_5"
+    save_marvellcmd "debug-mode;dump all tables6" "HW_table_6"
+    save_marvellcmd "debug-mode;dump all tables7" "HW_table_7"
+}
+
 ###############################################################################
 # Collect Broadcom specific information
 # Globals:
@@ -1734,6 +1795,11 @@ main() {
         collect_cisco_8000
     fi
 
+    if [ "$asic" = "marvell" ]; then
+        collect_marvell
+    fi
+
+
     # 2nd counter snapshot late. Need 2 snapshots to make sense of counters trend.
     save_counter_snapshot $asic 2