o wl3501: use the regulatory domain defines

I.e. less magic numbers, also rename freq_domain to reg_domain, as
in regulatory domain, as the atmel driver does, and that made me
realize that this defines and the function that checks if a channel
is valid in a regulatory domain should be moved to the wireless
extensions (or some other place) common code.

drivers/net/wireless/wl3501.h

@@ -194,12 +194,12 @@ enum wl3501_status {
 #define WL3501_MGMT_CAPABILITY_CF_POLL_REQUEST	0x0008  /*      - " -	   */
 #define WL3501_MGMT_CAPABILITY_PRIVACY		0x0010  /*      - " -	   */
 
-#define WL3501_FREQ_DOMAIN_FCC    0x10	/* Channel 1 to 11 */
-#define WL3501_FREQ_DOMAIN_IC     0x20	/* Channel 1 to 11 */
-#define WL3501_FREQ_DOMAIN_ETSI   0x30	/* Channel 1 to 13 */
-#define WL3501_FREQ_DOMAIN_SPAIN  0x31	/* Channel 10 to 11 */
-#define WL3501_FREQ_DOMAIN_FRANCE 0x32	/* Channel 10 to 13 */
-#define WL3501_FREQ_DOMAIN_MKK    0x40	/* Channel 14 */
+#define WL3501_REG_DOMAIN_FCC    0x10	/* Channel 1 to 11 */
+#define WL3501_REG_DOMAIN_IC     0x20	/* Channel 1 to 11 */
+#define WL3501_REG_DOMAIN_ETSI   0x30	/* Channel 1 to 13 */
+#define WL3501_REG_DOMAIN_SPAIN  0x31	/* Channel 10 to 11 */
+#define WL3501_REG_DOMAIN_FRANCE 0x32	/* Channel 10 to 13 */
+#define WL3501_REG_DOMAIN_MKK    0x40	/* Channel 14 */
 
 #define WL3501_ESSID_MAX_LEN (IW_ESSID_MAX_SIZE + 2)
 
@@ -528,7 +528,7 @@ struct wl3501_card {
 	u16				join_sta_bss;
 	unsigned char			rssi;
 	u8				adhoc_times;
-	u8				freq_domain;
+	u8				reg_domain;
 	u8				version[2];
 	struct wl3501_scan_confirm	bss_set[20];
 	struct net_device_stats 	stats;

drivers/net/wireless/wl3501_cs.c

@@ -175,7 +175,7 @@ static int wl3501_get_flash_mac_addr(struct wl3501_card *this)
 	WL3501_NOPLOOP(100);
 	this->mac_addr[5] = inb(base_addr + WL3501_NIC_IODPA);
 	WL3501_NOPLOOP(100);
-	this->freq_domain = inb(base_addr + WL3501_NIC_IODPA);
+	this->reg_domain = inb(base_addr + WL3501_NIC_IODPA);
 	WL3501_NOPLOOP(100);
 	wl3501_outb(WL3501_BSS_FPAGE0, base_addr + WL3501_NIC_BSS);
 	wl3501_outb(0x04, base_addr + WL3501_NIC_LMAL);
@@ -2093,17 +2093,17 @@ static void wl3501_config(dev_link_t *link)
 	spin_lock_init(&this->lock);
 	init_waitqueue_head(&this->wait);
 
-	switch (this->freq_domain) {
-	case 0x31:
-	case 0x32:
+	switch (this->reg_domain) {
+	case WL3501_REG_DOMAIN_SPAIN:
+	case WL3501_REG_DOMAIN_FRANCE:
 		this->def_chan = 10;
 		break;
-	case 0x40:
+	case WL3501_REG_DOMAIN_MKK:
 		this->def_chan = 14;
 		break;
-	case 0x10:
-	case 0x20:
-	case 0x30:
+	case WL3501_REG_DOMAIN_FCC:
+	case WL3501_REG_DOMAIN_IC:
+	case WL3501_REG_DOMAIN_ETSI:
 	default:
 		this->def_chan = 1;
 		break;