Fix a panic I introduced in r234487, the bridge softc pointer is set to null early in the detach so rearrange things not to explode.
Fix a panic I introduced in r234487, the bridge softc pointer is set to null
early in the detach so rearrange things not to explode.

Reported by:	David Roffiaen, Gustau Perez Querol
Tested by:	David Roffiaen
MFC after:	3 days

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