Don't store it in a u32.
Don't dereference the bus address as if it were a virtual address
(fixes 284231e4 ("ahci: Support splitting of read transactions
into multiple chunks")).
Fixes crash on boot in MPC8641HPCN_36BIT target.
Signed-off-by: Scott Wood <firstname.lastname@example.org>
Cc: Vadim Bendebury <email@example.com>
Acked-by: York Sun <firstname.lastname@example.org>