qed: fix dump of context data

Currently when dumping a context data only word number '1' is read for the
entire context.

Fixes: c965db44 ("qed: Add support for debug data collection")

Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>