axi_ad9434: Fix adc_status

adc_status was not driven by anything. Should be driven by adc_status_m1.

library/axi_ad9434/axi_ad9434_if.v

@@ -242,6 +242,7 @@ module axi_ad9434_if (
       adc_status <= 1'b0;
     end else begin
       adc_status_m1 <= up_drp_locked & delay_locked;
+      adc_status <= adc_status_m1;
     end
   end