Currently for beryllium targets, 64-bit field shift/mask
is used to set REO_CMD entry values.
For peach target, the HW header files provide only 32-bit
shift/mask macros, which does not work with the existing code.
Move the REO_CMD descriptor field set to structure field
dereference instead of bit field shift/mask.
Change-Id: Iec9a1618fc6c995aa0939badb4368a4c389fcbca
CRs-Fixed: 3584239