drivers/net/ixgbe/ixgbe_main.c: Checkpatch cleanups

Whitespace cleanups.
Move inline keyword after function type declarations.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>