fsl_sata: Add the workaround for errata SATA-A001

After power on, the SATA host controller of P1022 Rev1 is configured
in legacy mode instead of the expected enterprise mode.

Software needs to clear bit[28] of HControl register to change to
enterprise mode after bringing the host offline.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>