88b7c2b990
Switch HSA_AMD_SVM_ATTRIB_READ_ONLY to
HSA_AMD_SVM_ATTRIB_READ_MOSTLY to match Cuda. The new attribute
was just exposed in ROCr/KFD.
Change-Id: I2ee522d33c347ba52a4e272d2cd7f67960490cf7
[ROCm/clr commit: 89b69638d1]