pcnet32: fix reallocation error
pcnet32: fix reallocation error

pcnet32_realloc_rx_ring() only worked on the first log2 number of
entries in the receive ring instead of the all the entries.
Replaced "1 << size" with more descriptive variable.
This is my original bug from 2006.  Found while testing another problem.
Tested on 79C972 and 79C976.

Signed-off-by: Don Fry <373c554cfae520a361a973f3e28b0d8f158f26e0@frontier.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs