ata: corrected setting of 'read/write' bit in bus master command register
ata: corrected setting of 'read/write' bit in bus master command register

jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree,jmolloy/pedigree