[libata pdc_adma] license update, minor cleanup
[libata pdc_adma] license update, minor cleanup

from me: change from OSL+GPL to GPL (with approval)

from Mark: Gets rid of an unneeded control bit, slightly increasing
throughput.

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs