rx: Remove trailing else from RX_KERNEL_TRACE

rx: Remove trailing else from RX_KERNEL_TRACE

The RX_KERNEL_TRACE ifdefs all contain a trailing else, which makes
no logicial sense given the rest of the code. The only effect of this
trailing else is to cause packets to not be sent when tracing is
enabled, which probably isn't the desired behaviour.

Change-Id: I2175b1d8270cd096361f349a467245b49efabf6b
Reviewed-on: http://gerrit.openafs.org/7001
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>