serial: icom: remove to_icom_adapter() and icom_kref_release()

Integrate both the to_icom_adapter() macro and icom_kref_release()
wrapper into icom_remove_adapter(). (And keep it icom_kref_release()
name.)

It makes the code easier to follow without complex indirections.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220421085808.24152-4-jslaby@suse.czSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/icom.c

@@ -47,7 +47,6 @@
 
 #define ICOM_DRIVER_NAME "icom"
 #define NR_PORTS	       128
-#define to_icom_adapter(d) container_of(d, struct icom_adapter, kref)
 
 static inline struct icom_port *to_icom_port(struct uart_port *port)
 {
@@ -1447,8 +1446,10 @@ static void icom_free_adapter(struct icom_adapter *icom_adapter)
 	kfree(icom_adapter);
 }
 
-static void icom_remove_adapter(struct icom_adapter *icom_adapter)
+static void icom_kref_release(struct kref *kref)
 {
+	struct icom_adapter *icom_adapter = container_of(kref,
+			struct icom_adapter, kref);
 	struct icom_port *icom_port;
 	int index;
 
@@ -1481,14 +1482,6 @@ static void icom_remove_adapter(struct icom_adapter *icom_adapter)
 	icom_free_adapter(icom_adapter);
 }
 
-static void icom_kref_release(struct kref *kref)
-{
-	struct icom_adapter *icom_adapter;
-
-	icom_adapter = to_icom_adapter(kref);
-	icom_remove_adapter(icom_adapter);
-}
-
 static int icom_probe(struct pci_dev *dev,
 				const struct pci_device_id *ent)
 {