pkg/platform/{aws,baremetal,packet}: add Name const

As a preparation to #992, so platform name from the configuration don't
need to be duplicated.

Signed-off-by: Mateusz Gozdek <mateusz@kinvolk.io>

pkg/platform/aws/aws.go

@@ -89,9 +89,14 @@ type config struct {
 	KubeAPIServerExtraFlags  []string
 }
 
+const (
+	// Name represents AWS platform name as it should be referenced in function calls and configuration.
+	Name = "aws"
+)
+
 // init registers aws as a platform
 func init() {
-	platform.Register("aws", NewConfig())
+	platform.Register(Name, NewConfig())
 }
 
 func (c *config) LoadConfig(configBody *hcl.Body, evalContext *hcl.EvalContext) hcl.Diagnostics {

pkg/platform/baremetal/baremetal.go

@@ -61,9 +61,14 @@ type config struct {
 	KubeAPIServerExtraFlags  []string
 }
 
+const (
+	// Name represents Bare Metal platform name as it should be referenced in function calls and configuration.
+	Name = "bare-metal"
+)
+
 // init registers bare-metal as a platform
 func init() {
-	platform.Register("bare-metal", NewConfig())
+	platform.Register(Name, NewConfig())
 }
 
 func (c *config) LoadConfig(configBody *hcl.Body, evalContext *hcl.EvalContext) hcl.Diagnostics {

pkg/platform/packet/packet.go

@@ -105,9 +105,14 @@ type config struct {
 	NodesDependOn           []string
 }
 
+const (
+	// Name represents Packet platform name as it should be referenced in function calls and configuration.
+	Name = "packet"
+)
+
 // init registers packet as a platform
 func init() {
-	platform.Register("packet", NewConfig())
+	platform.Register(Name, NewConfig())
 }
 
 func (c *config) LoadConfig(configBody *hcl.Body, evalContext *hcl.EvalContext) hcl.Diagnostics {