common/up_dac_common: Expose r1_mode in up clock domain to prevent de…

…adlock

If R1 mode is first syncronized to the dac clock domain will prevent its
usage if the dac clock is missing. In such case the synchronization will not
propagate.

library/common/up_dac_common.v

@@ -77,6 +77,7 @@ module up_dac_common #(
   input       [31:0]  up_pps_rcounter,
   input               up_pps_status,
   output  reg         up_pps_irq_mask,
+  output  reg         up_dac_r1_mode = 'd0,
 
   // drp interface
 
@@ -127,7 +128,6 @@ module up_dac_common #(
   reg             up_dac_sdr_ddr_n = 'd0;
   reg             up_dac_par_type = 'd0;
   reg             up_dac_par_enb = 'd0;
-  reg             up_dac_r1_mode = 'd0;
   reg             up_dac_datafmt = 'd0;
   reg     [15:0]  up_dac_datarate = 'd0;
   reg             up_dac_frame = 'd0;