gianfar needs crc32 lib dependency

Gianfar needs crc32 to be selected to compile.

Signed-off-by: Dave Jiang <djiang@mvista.com>

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 drivers/net/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
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Signed-off-by: Jeff Garzik <jeff@garzik.org>