net: ehea: convert to use DRIVER_ATTR_RO

We are trying to get rid of DRIVER_ATTR(), and the ehea driver's
attribute can be trivially changed to use DRIVER_ATTR_RO().

Cc: Douglas Miller <dougmill@linux.vnet.ibm.com>
Cc: <netdev@vger.kernel.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/net/ethernet/ibm/ehea/ehea_main.c

@@ -3553,14 +3553,12 @@ static int check_module_parm(void)
 	return ret;
 }
 
-static ssize_t ehea_show_capabilities(struct device_driver *drv,
-				      char *buf)
+static ssize_t capabilities_show(struct device_driver *drv, char *buf)
 {
 	return sprintf(buf, "%d", EHEA_CAPABILITIES);
 }
 
-static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
-		   ehea_show_capabilities, NULL);
+static DRIVER_ATTR_RO(capabilities);
 
 static int __init ehea_module_init(void)
 {