Fix incorrect offset calculation and remove unnecessary remap
of the region in bar 0 to access onchip memory.

This was leading to read incorrect values by debug tools.
Signed-off-by: NDhananjay Phadke <dhananjay.phadke@qlogic.com>
Signed-off-by: NAmit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>