BACKPORT: scsi: ufs: core: Maximum RTT supported by the host driver

Allow platform vendors to take precedence having their own max rtt support.
This makes sense because the host controller's nortt characteristic may
vary among vendors.

while at it, set this value for Mediatek, as requested by Peter -
https://lore.kernel.org/all/0a57d6bab739d6a10584f2baba115d00dfc9c94c.camel@mediatek.com/



Change-Id: I577997ccb7d132b10e3fe338108093f4a68b1d35
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240530142510.734-3-avri.altman@wdc.com


Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Bug: 362473899
(cherry picked from commit e75ff633)
[ bvanassche: converted the MTK RTT limit into a test based on the controller name ]
Signed-off-by: Bart Van Assche <bvanassche@google.com>