generic: remove support for older kernels from swconfig

The legacy swconfig switch driver framework supports kernels older than
Linux 6.6 by using #ifdef'ery with LINUX_VERSION_CODE. Remove all that.

Signed-off-by: Daniel Golle <[email protected]>

target/linux/generic/files/drivers/net/phy/swconfig.c

@@ -24,7 +24,6 @@
 #include <linux/skbuff.h>
 #include <linux/switch.h>
 #include <linux/of.h>
-#include <linux/version.h>
 #include <uapi/linux/mii.h>
 
 #define SWCONFIG_DEVNAME	"switch%d"
@@ -1054,9 +1053,7 @@ static struct genl_family switch_fam = {
 	.module = THIS_MODULE,
 	.ops = swconfig_ops,
 	.n_ops = ARRAY_SIZE(swconfig_ops),
-#if LINUX_VERSION_CODE > KERNEL_VERSION(6,0,0)
 	.resv_start_op = SWITCH_CMD_SET_VLAN + 1,
-#endif
 };
 
 #ifdef CONFIG_OF

target/linux/generic/files/drivers/net/phy/swconfig_leds.c

@@ -85,11 +85,7 @@ swconfig_trig_update_port_mask(struct led_trigger *trigger)
 	sw_trig = (void *) trigger;
 
 	port_mask = 0;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,16,0)
 	spin_lock(&trigger->leddev_list_lock);
-#else
-	read_lock(&trigger->leddev_list_lock);
-#endif
 	list_for_each(entry, &trigger->led_cdevs) {
 		struct led_classdev *led_cdev;
 		struct swconfig_trig_data *trig_data;
@@ -102,11 +98,7 @@ swconfig_trig_update_port_mask(struct led_trigger *trigger)
 			read_unlock(&trig_data->lock);
 		}
 	}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,16,0)
 	spin_unlock(&trigger->leddev_list_lock);
-#else
-	read_unlock(&trigger->leddev_list_lock);
-#endif
 
 	sw_trig->port_mask = port_mask;
 
@@ -426,22 +418,14 @@ swconfig_trig_update_leds(struct switch_led_trigger *sw_trig)
 	struct led_trigger *trigger;
 
 	trigger = &sw_trig->trig;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,16,0)
 	spin_lock(&trigger->leddev_list_lock);
-#else
-	read_lock(&trigger->leddev_list_lock);
-#endif
 	list_for_each(entry, &trigger->led_cdevs) {
 		struct led_classdev *led_cdev;
 
 		led_cdev = list_entry(entry, struct led_classdev, trig_list);
 		swconfig_trig_led_event(sw_trig, led_cdev);
 	}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,16,0)
 	spin_unlock(&trigger->leddev_list_lock);
-#else
-	read_unlock(&trigger->leddev_list_lock);
-#endif
 }
 
 static void