staging: et131x: Replace rxdma csr register magic numbers with defines

Several magic numbers were used to represent rxdma csr register bitmasks.
Replace them with descriptive defines.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 files changed