iwlagn: add get_dev to iwl_bus_ops

Bus specific layer must know how to return the struct device* of the device.
Implement that as a callback of iwl_bus_ops and use that callback instead of
using the priv->pdev pointer which is meant to disappear soon.

Since the struct device * is needed in hot path, iwl_bus holds a pointer to it
instead of calling get_dev all the time.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-debug.h

@@ -32,10 +32,10 @@
 struct iwl_priv;
 extern u32 iwl_debug_level;
 
-#define IWL_ERR(p, f, a...) dev_err(&((p)->pci_dev->dev), f, ## a)
-#define IWL_WARN(p, f, a...) dev_warn(&((p)->pci_dev->dev), f, ## a)
-#define IWL_INFO(p, f, a...) dev_info(&((p)->pci_dev->dev), f, ## a)
-#define IWL_CRIT(p, f, a...) dev_crit(&((p)->pci_dev->dev), f, ## a)
+#define IWL_ERR(p, f, a...) dev_err(p->bus.ops->get_dev(&p->bus), f, ## a)
+#define IWL_WARN(p, f, a...) dev_warn(p->bus.ops->get_dev(&p->bus), f, ## a)
+#define IWL_INFO(p, f, a...) dev_info(p->bus.ops->get_dev(&p->bus), f, ## a)
+#define IWL_CRIT(p, f, a...) dev_crit(p->bus.ops->get_dev(&p->bus), f, ## a)
 
 #define iwl_print_hex_error(priv, p, len) 				\
 do {									\