intel_mp: fix ctype diversity for txdesc_t
intel_mp: fix ctype diversity for txdesc_t

Move the ctype declaration of txdesc_t out of the init_tx_q() method
to make its ctype identical in all instances of the driver.  This
eliminates certain side traces in the transmit code path.

snabbco/snabb,eugeneia/snabb,eugeneia/snabb,eugeneia/snabb,alexandergall/snabbswitch,snabbco/snabb,eugeneia/snabb,Igalia/snabb,SnabbCo/snabbswitch,Igalia/snabb,snabbco/snabb,alexandergall/snabbswitch,Igalia/snabbswitch,snabbco/snabb,Igalia/snabbswitch,Igalia/snabb,SnabbCo/snabbswitch,SnabbCo/snabbswitch,Igalia/snabb,Igalia/snabbswitch,Igalia/snabbswitch,SnabbCo/snabbswitch,alexandergall/snabbswitch,snabbco/snabb,Igalia/snabb,Igalia/snabb,snabbco/snabb,eugeneia/snabb,alexandergall/snabbswitch,alexandergall/snabbswitch,snabbco/snabb,alexandergall/snabbswitch,eugeneia/snabb,eugeneia/snabb,Igalia/snabb,Igalia/snabbswitch,Igalia/snabb,alexandergall/snabbswitch,alexandergall/snabbswitch,snabbco/snabb,eugeneia/snabb