add adapter_type description

Author: ewypych

website/source/docs/providers/vsphere/r/virtual_disk.html.markdown

@@ -14,11 +14,12 @@ Provides a VMware virtual disk resource.  This can be used to create and delete
 
 ```
 resource "vsphere_virtual_disk" "myDisk" {
-  size       = 2
-  vmdk_path  = "myDisk.vmdk"
-  datacenter = "Datacenter"
-  datastore  = "local"
-  type       = "thin"
+  size	     	= 2
+  vmdk_path  	= "myDisk.vmdk"
+  datacenter 	= "Datacenter"
+  datastore  	= "local"
+  type       	= "thin"
+  adapter_type  = "lsiLogic"
 }
 ```
 
@@ -28,6 +29,7 @@ The following arguments are supported:
 
 * `size` - (Required) Size of the disk (in GB).
 * `vmdk_path` - (Required) The path, including filename, of the virtual disk to be created.  This should end with '.vmdk'.
-* `type` - (Optional) 'eagerZeroedThick' (the default), or 'thin' are supported options.
+* `type` - (Optional) 'eagerZeroedThick' (the default), 'lazy', or 'thin' are supported options.
+* `adapter_type` - (Optional) set adapter type, 'ide' (the default), 'lsiLogic', or 'busLogic' are supported options.
 * `datacenter` - (Optional) The name of a Datacenter in which to create the disk.
-* `datastore` - (Required) The name of the Datastore in which to create the disk.
+* `datastore` - (Required) The name of the Datastore in which to create the disk.