v3d: writes to V3D_QPU_WADDR_NOP don't generate RF writes after THREND
We avoid validation errors for cases like this at the end of the shader: nop ; nop ; thrsw; ldtmu.- *** ERROR *** nop ; nop nop ; nop
This MR was initially named: "v3d: ldtmu since V3D 4.1 returns to rf or accumulators"
ldtmu since V3D 4.1 returns values to regfiles and accumulators and also the NOP magic address. This was not included in all the places so we are completing it now.