oxnas: refresh kernel config-3.1[48]

and no longer compile-in ext4 filesystem now that sata_oxnas is
also built as a module.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43765 3c298f89-4303-0410-b956-a3cf2f4a3e73
oxnas: sata_oxnas: refactoring phase 1

locking for 2nd port and hwraid was added from vendor's GPL code which
doesn't comply with current kernel coding style.

 - moved all global variables into host_priv
 - renamed locks
 - sanetized acquire() and release() parameter list

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43766 3c298f89-4303-0410-b956-a3cf2f4a3e73
oxnas: sata_oxnas: refactoring phase 2

 - replaced // comments by /* comments */
 - added line-breaks where needed
 - fixed white-space according to kernel style
 - fixed some obvious spelling mistakes in comments and printks
 - removed some unneeded left-overs imported from vendor code-base
 - replaced printk(...) by libata macros where possible

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43767 3c298f89-4303-0410-b956-a3cf2f4a3e73
oxnas: sata_oxnas: make irq handler more readable

safed one level of indention by using 'continue' instead of a
lengthy if-clause.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
v2: use logic-AND instead of '?' operator when checking for hw bug 6320

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43768 3c298f89-4303-0410-b956-a3cf2f4a3e73