Minor. Move unwrapping of FunctionImportedFromObject

It should not affect the semantics, because mapSignatureWithCustomParameters
can only be called with FunctionImportedFromObject from mapSignature.

At the same time it's very nice to have all of these kinds
of custom unwrapping in the same place

compiler/backend/src/org/jetbrains/kotlin/codegen/state/KotlinTypeMapper.java

@@ -1034,6 +1034,10 @@ public class KotlinTypeMapper {
             return mapSignature(((TypeAliasConstructorDescriptor) f).getUnderlyingConstructorDescriptor(), kind, skipGenericSignature);
         }
 
+        if (f instanceof FunctionImportedFromObject) {
+            return mapSignature(((FunctionImportedFromObject) f).getCallableFromObject(), kind, skipGenericSignature);
+        }
+
         if (CoroutineCodegenUtilKt.isSuspendFunctionNotSuspensionView(f)) {
             return mapSignature(CoroutineCodegenUtilKt.getOrCreateJvmSuspendFunctionView(f), kind, skipGenericSignature);
         }
@@ -1052,10 +1056,6 @@ public class KotlinTypeMapper {
             @NotNull List<ValueParameterDescriptor> valueParameters,
             boolean skipGenericSignature
     ) {
-        if (f instanceof FunctionImportedFromObject) {
-            return mapSignature(((FunctionImportedFromObject) f).getCallableFromObject(), kind, skipGenericSignature);
-        }
-
         checkOwnerCompatibility(f);
 
         JvmSignatureWriter sw = skipGenericSignature || f instanceof AccessorForCallableDescriptor