Fix === for abstract Reset types (#3979) (#3982)

Previously, the function would infinitely recurse resulting in a stack
overflow.

(cherry picked from commit ea2d103)

Co-authored-by: Jack Koenig <koenig@sifive.com>

core/src/main/scala/chisel3/Data.scala

@@ -912,7 +912,7 @@ object Data {
         case (thiz: UInt, that: UInt) => thiz === that
         case (thiz: SInt, that: SInt) => thiz === that
         case (thiz: AsyncReset, that: AsyncReset) => thiz.asBool === that.asBool
-        case (thiz: Reset, that: Reset) => thiz === that
+        case (thiz: Reset, that: Reset) => thiz.asBool === that.asBool
         case (thiz: EnumType, that: EnumType) => thiz === that
         case (thiz: Clock, that: Clock) => thiz.asUInt === that.asUInt
         case (thiz: Vec[_], that: Vec[_]) =>

src/test/scala/chiselTests/DataEqualitySpec.scala

@@ -109,6 +109,11 @@ class DataEqualitySpec extends ChiselFlatSpec with Utils {
       new EqualityTester(true.B, false.B)
     }
   }
+  it should "support abstract reset wires" in {
+    assertTesterPasses {
+      new EqualityTester(WireDefault(Reset(), true.B), WireDefault(Reset(), true.B))
+    }
+  }
 
   behavior.of("AsyncReset === AsyncReset")
   it should "pass with equal values" in {