hisi_sas: add v2 hw init
Add code to initialise the hardware. Support is also added to deal with the "am-max-transmissions" (amt) limitation in hip06 controller #1. This is how many connection requests we can send on the system bus before waiting for a response. Due to chip bus design, controller #1 is limited to 32 amt, while, by design, a controller supports 64. The default value for the nibbles in the relevant registers is 0x40; these need to be programmed with 0x20. Signed-off-by:John Garry <john.garry@huawei.com> Reviewed-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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