rt2800: add eFuse EEPROM support code to rt2800lib

eFuse EEPROM is used also by USB chips (i.e. RT3070)
so move the needed code from rt2800pci to rt2800lib.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800.h

@@ -361,6 +361,35 @@
 #define RF_CSR_CFG_WRITE		FIELD32(0x00010000)
 #define RF_CSR_CFG_BUSY			FIELD32(0x00020000)
 
+/*
+ * EFUSE_CSR: RT30x0 EEPROM
+ */
+#define EFUSE_CTRL			0x0580
+#define EFUSE_CTRL_ADDRESS_IN		FIELD32(0x03fe0000)
+#define EFUSE_CTRL_MODE			FIELD32(0x000000c0)
+#define EFUSE_CTRL_KICK			FIELD32(0x40000000)
+#define EFUSE_CTRL_PRESENT		FIELD32(0x80000000)
+
+/*
+ * EFUSE_DATA0
+ */
+#define EFUSE_DATA0			0x0590
+
+/*
+ * EFUSE_DATA1
+ */
+#define EFUSE_DATA1			0x0594
+
+/*
+ * EFUSE_DATA2
+ */
+#define EFUSE_DATA2			0x0598
+
+/*
+ * EFUSE_DATA3
+ */
+#define EFUSE_DATA3			0x059c
+
 /*
  * MAC Control/Status Registers(CSR).
  * Some values are set in TU, whereas 1 TU == 1024 us.