dp8393x: Mask EOL bit from descriptor addresses, take 2

dp8393x: Mask EOL bit from descriptor addresses, take 2

A portion of a recent patch got lost due to a merge snafu. That patch is
now commit 88f632fbb1 ("dp8393x: Mask EOL bit from descriptor addresses").
This patch restores the portion that got lost.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <alpine.LNX.2.22.394.2003041421280.12@nippy.intranet>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
(cherry picked from commit a0cf4297d6b8d88047ab00c467f14aecf9c2a8eb)
 Conflicts:
	hw/net/dp8393x.c
*drop context dep. on 19f70347
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>