nitrogen6_max: config: always include SATA support

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Revert "nitrogen6x: 6x_bootscript*: pass disable_giga parameter to kernel"

This reverts commit f781caf463ad94941dfb5114c200d237edb8ec68.
nitrogen6_max: always include SATA

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>