Getting Custome meta data Picklist values in lightning component

 Lightning Component:

  <aura:attribute name="plantNo" type ="String"/>

 <aura:attribute name="plantMap" type="Map"/>

<aura:attribute name="SelectPlant" type="String" Default="2001" />

<aura:handler name="init" value="{!this}" action="{!c.getPlantpicklist}" />

<lightning:select aura:id="plantPicklist" value="{!v.SelectPlant}" name="Plant Type" label="Plant Type" required="true">

                    <aura:iteration items="{!v.plantMap}" var="p" indexVar="key">

                        <option text="{!p.value}" value="{!p.key}" selected="{!p.key=='2001'}"  />

                    </aura:iteration>

                </lightning:select>

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Lightning component controller:

 getPlantpicklist:function(component,event,helper)

    {

        //get plant picklist 

        var action = component.get("c.getPlant");

        action.setCallback(this, function(response) {

            var state = response.getState();

            if (state === "SUCCESS") {

                var result = response.getReturnValue();

                var plantvalueMap = [];

                for(var key in result){

                    plantvalueMap.push({key: key, value: result[key]});

                }

                component.set("v.plantMap", plantvalueMap);

            }

        });

        $A.enqueueAction(action);

    },

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Server side Controller

 @AuraEnabled //get Plant Picklist Values from custom meta data

    public static Map<String, String> getPlant(){

        Map<String, String> options = new Map<String, String>();

        //get Plant type Field Describe

        Schema.DescribeFieldResult fieldResult = Plant_Setting__mdt.Plant_Type__c.getDescribe();

        //get plant Picklist Values

        List<Schema.PicklistEntry> pList = fieldResult.getPicklistValues();

        for (Schema.PicklistEntry p: pList) {

            //Put Picklist Value & Label in Map

            options.put(p.getValue(), p.getLabel());

        }

        system.debug('picklist values: '+options);

        return options;

    }