igb_uio: fix legacy MSI masking
igb_uio: fix legacy MSI masking

MSI masks contain a 1 if interrupt is masked, 0 if unmasked.
I got that wrong with the !!state calculation. For better
readability, the mask is now changed like in igbuio_msi_mask_irq.

Fixes: a8ea1e5fb647 ("igb_uio: fix unknown MSI symbols")

Signed-off-by: Markus Theil <8d5584ed2ba091d398f480a39d3375bd5f6b9f38@tu-ilmenau.de>
Tested-by: Markus Theil <8d5584ed2ba091d398f480a39d3375bd5f6b9f38@tu-ilmenau.de>
Acked-by: Ferruh Yigit <ba8734c3c506d2e3557bd4ac8fdaccd25bdb9aa7@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk