Reporting same value for smbios.chassis.maker as smbios.system.maker

[olivier]

Summary

On r367152, I've prevented some fields (smbios.system.maker and smbios.system.family) to return the non-printable space character.
But there is still one variable into the kenv output that is returning this: smbios.chassis.maker.
So reports the same value for smbios.chassis.maker as smbios.system.maker.