sdhci_fsl_fdt: Fix vccq reconfiguration

[hum_semihalf.com]

Summary

As vqmmc-supply is an optional Device Tree property, don't skip vccq
reconfiguration when the regulator is not specified. Instead, accept
voltage specified by the voltage-ranges property.

The actual voltage switch is done through a hw register in LS1028A.
Add errata flag for other boards, as they are not supported. Return
not supported error code when switching to 1.8V on affected platforms.

Fixes: b08bf4c3 ("sdhci_fsl_fdt: Skip vccq reconfiguration without regulator")

Co-authored-by: Artur Rojek <[e-mail]>

[hum_semihalf.com]

Update commit log.

[manu]

sys/dev/sdhci/sdhci_fsl_fdt.c

524

You don't need this variable.

[hum_semihalf.com]

Remove redundant variable.