ata: ahci_tegra: Add AHCI support for Tegra186

ata: ahci_tegra: Add AHCI support for Tegra186

This patch adds support for AHCI-compliant Serial ATA controller
on Tegra186 SoC.

Tegra186 does not have sata-oob reset.
Tegra186 SATA_NVOOB register filed COMMA_CNT position and width are
different compared to Tegra210 and prior.

So, this patch adds a flag has_sata_oob_rst and tegra_ahci_regs to
SoC specific strcuture tegra_ahci_soc and updated their implementation
accordingly.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/1617758731-12380-4-git-send-email-skomatineni@nvidia.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>