wifi: mt76: limit support of precal loading for mt7915 to MTD only

Limit support for precal loading for mt7915 only to MTD. Passing data
from DT doesn't support offset and NVMEM require a different cell name
and doesn't support offset hence only MTD way is actually supported.

Rename mt76_get_of_eeprom_from_mtd to mt76_get_of_data_from_mtd as it is
now used for a more generic purpose and export it.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/eeprom.c

@@ -28,7 +28,7 @@ static int mt76_get_of_eeprom_data(struct mt76_dev *dev, void *eep, int len)
 	return 0;
 }
 
-static int mt76_get_of_epprom_from_mtd(struct mt76_dev *dev, void *eep, int offset, int len)
+int mt76_get_of_data_from_mtd(struct mt76_dev *dev, void *eep, int offset, int len)
 {
 #ifdef CONFIG_MTD
 	struct device_node *np = dev->dev->of_node;
@@ -105,6 +105,7 @@ static int mt76_get_of_epprom_from_mtd(struct mt76_dev *dev, void *eep, int offs
 	return -ENOENT;
 #endif
 }
+EXPORT_SYMBOL_GPL(mt76_get_of_data_from_mtd);
 
 static int mt76_get_of_eeprom_from_nvmem(struct mt76_dev *dev, void *eep, int len)
 {
@@ -149,7 +150,7 @@ int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len)
 	if (!ret)
 		return 0;
 
-	ret = mt76_get_of_epprom_from_mtd(dev, eep, offset, len);
+	ret = mt76_get_of_data_from_mtd(dev, eep, offset, len);
 	if (!ret)
 		return 0;
 

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -1102,6 +1102,7 @@ void mt76_seq_puts_array(struct seq_file *file, const char *str,
 
 int mt76_eeprom_init(struct mt76_dev *dev, int len);
 void mt76_eeprom_override(struct mt76_phy *phy);
+int mt76_get_of_data_from_mtd(struct mt76_dev *dev, void *eep, int offset, int len);
 int mt76_get_of_eeprom(struct mt76_dev *dev, void *data, int offset, int len);
 
 struct mt76_queue *

drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c

@@ -25,7 +25,7 @@ static int mt7915_eeprom_load_precal(struct mt7915_dev *dev)
 
 	offs = is_mt7915(&dev->mt76) ? MT_EE_PRECAL : MT_EE_PRECAL_V2;
 
-	return mt76_get_of_eeprom(mdev, dev->cal, offs, val);
+	return mt76_get_of_data_from_mtd(mdev, dev->cal, offs, val);
 }
 
 static int mt7915_check_eeprom(struct mt7915_dev *dev)