opencl: fix ndst for mul_mv_mxfp4_f32_flat for adreno

Author: lhez

ggml/src/ggml-opencl/ggml-opencl.cpp

@@ -6984,7 +6984,7 @@ static void ggml_cl_mul_mat(ggml_backend_t backend, const ggml_tensor * src0, co
             } else if (backend_ctx->gpu_family == ADRENO) {
                 nth0 = 64;
                 nth1 = 2;
-                ndst = nth1;
+                ndst = nth1*2;
 
                 q = extra0_mxfp4->q_img;
             } else {