Fixed Yosys select command syntax to support newer Yosys versions.

Signed-off-by: Maciej Kurc <mkurc@antmicro.com>

v2x/yosys/run.py

diff --git a/v2x/yosys/run.py b/v2x/yosys/run.py
index 25b4e82..4636e2c 100755
--- a/v2x/yosys/run.py
+++ b/v2x/yosys/run.py
@@ -283,7 +283,7 @@
     innet: Name of input net to find sinks of
     """
     return do_select(
-        infiles, module, "{} %co* o:* %i {} %d".format(innet, innet)
+        infiles, module, "={} %co* =o:* %i ={} %d".format(innet, innet)
     )
 
 
@@ -297,7 +297,7 @@
     """
     return do_select(
         infiles, module,
-        "c:* %x:+[CLK]:+[clk]:+[clock]:+[CLOCK] c:* %d x:* %i"
+        "=c:* %x:+[CLK]:+[clk]:+[clock]:+[CLOCK] =c:* %d =x:* %i"
     )
 
 
@@ -312,7 +312,7 @@
     """
     return do_select(
         infiles, module,
-        "select -list {} %a %co* %x i:* o:* %u %i a:ASSOC_CLOCK={} %u {} %d".
+        "select -list ={} %a %co* %x =i:* =o:* %u %i =a:ASSOC_CLOCK={} %u ={} %d".
         format(clk, clk, clk)
     )
 
@@ -337,7 +337,7 @@
     clk: Name of clock to find associated signals
     """
     return do_select(
-        infiles, module, "select -list w:*{} %a %co* o:* %i".format(signal)
+        infiles, module, "select -list =w:*{} %a %co* =o:* %i".format(signal)
     )
 
 
@@ -353,6 +353,6 @@
     return [
         x for x in do_select(
             infiles, module,
-            "select -list w:*{} %a %co* %x i:* %i".format(signal)
+            "select -list =w:*{} %a %co* %x =i:* %i".format(signal)
         ) if x != signal
     ]