Description of problem: upon attempting to install OCP 4.10 UPI on baremetal ppc64le, the openshift-install gather command returns `panic: unsupported platform "none"`

Version-Release number of selected component (if applicable):

OCP 4.10.16

openshift-install 4.10.24 

How reproducible:

easily

Steps to Reproduce:
1. create install config
2. create manifests
3. create ignition configs

4. openshift-install gather bootstrap --log-level "debug"

Actual results:

DEBUG OpenShift Installer 4.10.24                  
DEBUG Built from commit d63a12ba0ec33d492093a8fc0e268a01a075f5da 
DEBUG Fetching Bootstrap SSH Key Pair...           
DEBUG Loading Bootstrap SSH Key Pair...            
DEBUG Using Bootstrap SSH Key Pair loaded from state file 
DEBUG Reusing previously-fetched Bootstrap SSH Key Pair 
DEBUG Fetching Install Config...                   
DEBUG Loading Install Config...                    
DEBUG   Loading SSH Key...                         
DEBUG   Loading Base Domain...                     
DEBUG     Loading Platform...                      
DEBUG   Loading Cluster Name...                    
DEBUG     Loading Base Domain...                   
DEBUG     Loading Platform...                      
DEBUG   Loading Networking...                      
DEBUG     Loading Platform...                      
DEBUG   Loading Pull Secret...                     
DEBUG   Loading Platform...                        
DEBUG Loading Install Config from both state file and target directory 
DEBUG On-disk Install Config matches asset in state file 
DEBUG Using Install Config loaded from state file  
DEBUG Reusing previously-fetched Install Config    
panic: unsupported platform "none"

goroutine 1 [running]:
github.com/openshift/installer/pkg/terraform/stages/platform.StagesForPlatform({0x146f2d0a, 0x1619aa08})
        /go/src/github.com/openshift/installer/pkg/terraform/stages/platform/stages.go:55 +0x2ff
main.runGatherBootstrapCmd({0x14d8e028, 0x1})
        /go/src/github.com/openshift/installer/cmd/openshift-install/gather.go:115 +0x2d6
main.newGatherBootstrapCmd.func1(0xc001364500, {0xc0005a0b40, 0x2, 0x2})
        /go/src/github.com/openshift/installer/cmd/openshift-install/gather.go:65 +0x59
github.com/spf13/cobra.(*Command).execute(0xc001364500, {0xc0005a0b20, 0x2, 0x2})
        /go/src/github.com/openshift/installer/vendor/github.com/spf13/cobra/command.go:860 +0x5f8
github.com/spf13/cobra.(*Command).ExecuteC(0xc001334c80)
        /go/src/github.com/openshift/installer/vendor/github.com/spf13/cobra/command.go:974 +0x3bc
github.com/spf13/cobra.(*Command).Execute(...)
        /go/src/github.com/openshift/installer/vendor/github.com/spf13/cobra/command.go:902
main.installerMain()
        /go/src/github.com/openshift/installer/cmd/openshift-install/main.go:72 +0x29e
main.main()
        /go/src/github.com/openshift/installer/cmd/openshift-install/main.go:50 +0x125

Expected results:

I'm not really sure what I expected to happen.  I've never used that gather before..

I would assume at least no panicking.

Additional info: