[FS#1284] uboot-kirkwood does not speak MMC on Pogoplug v4

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Nathaniel Wesley Filardo (nwf) 

Attached to Project - OpenWrt/LEDE Project
Summary - uboot-kirkwood does not speak MMC on Pogoplug v4
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Testing on a Pogoplug V4 with the u-boot committed in f5d267df638d7adc6654f4a1a3d7c7557cafd759, there is no MMC support despite that 010-pogoplug_v4.patch includes kirkwood_mmc.c and friends.  Boot messages are simply


U-Boot 2017.09 (Jan 19 2018 - 21:51:49 +0000)
Pogoplug V4

SoC:   Kirkwood 88F6281_A1
DRAM:  128 MiB
WARNING: Caches not enabled
NAND:  128 MiB
MMC:   
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   egiga0
Error: egiga0 address not set.


On the other hand, the uboot shipped from https://forum.doozan.com/read.php?3,7477,7553 understands MMC.  Its boot messages are


U-Boot 2017.07-tld-1 (Sep 05 2017 - 00:34:01 -0700)
Pogoplug V4

SoC:   Kirkwood 88F6192_A1
DRAM:  128 MiB
WARNING: Caches not enabled
NAND:  128 MiB
MMC:   MVEBU_MMC: 0
In:    serial
Out:   serial
Err:   serial
Net:   egiga0


More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1284