forcedeth: disable msix

There seems to be an issue when both MSI-X is enabled and NAPI is
configured. This patch disables MSI-X until the issue is root caused.

Signed-Off-By: Ayaz Abdulla <aabdulla@nvidia.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/forcedeth.c

@@ -839,7 +839,7 @@ enum {
 	NV_MSIX_INT_DISABLED,
 	NV_MSIX_INT_ENABLED
 };
-static int msix = NV_MSIX_INT_ENABLED;
+static int msix = NV_MSIX_INT_DISABLED;
 
 /*
  * DMA 64bit