rx mutex inversion fix

rx mutex inversion fix

as discovered by Benjamin Kaduk, we were usually holding rx_refcnt_mutex
but briefly, and here we held it longer, and thus around acquiring freepktQ
mutex. undo it by simply setting STATE_RESET sooner as newcall does.

(cherry picked from commit d5ce8d19ace9b87816dd36663420136f5f2ad746)

Change-Id: Ic4b13dcf09006d3c8171b63f254129fe202e7155
Reviewed-on: http://gerrit.openafs.org/3243
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>