qlcnic: Fix endian issues in 83xx driver

o Split mailbox structure elements on boundary of adapter
  register size i.e. 32bit.
o Shuffle the position of structure elements based on CPU endianness.

Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>