mtd: nand: drop EXPORT_SYMBOL_GPL for nanddev_erase()

This function is only used within this module, so it is no longer
necessary to use EXPORT_SYMBOL_GPL().
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221018170205.1733958-1-dario.binacchi@amarulasolutions.com

drivers/mtd/nand/core.c

@@ -126,7 +126,7 @@ EXPORT_SYMBOL_GPL(nanddev_isreserved);
  *
  * Return: 0 in case of success, a negative error code otherwise.
  */
-int nanddev_erase(struct nand_device *nand, const struct nand_pos *pos)
+static int nanddev_erase(struct nand_device *nand, const struct nand_pos *pos)
 {
 	if (nanddev_isbad(nand, pos) || nanddev_isreserved(nand, pos)) {
 		pr_warn("attempt to erase a bad/reserved block @%llx\n",
@@ -136,7 +136,6 @@ int nanddev_erase(struct nand_device *nand, const struct nand_pos *pos)
 
 	return nand->ops->erase(nand, pos);
 }
-EXPORT_SYMBOL_GPL(nanddev_erase);
 
 /**
  * nanddev_mtd_erase() - Generic mtd->_erase() implementation for NAND devices

include/linux/mtd/nand.h

@@ -999,7 +999,6 @@ static inline bool nanddev_io_iter_end(struct nand_device *nand,
 
 bool nanddev_isbad(struct nand_device *nand, const struct nand_pos *pos);
 bool nanddev_isreserved(struct nand_device *nand, const struct nand_pos *pos);
-int nanddev_erase(struct nand_device *nand, const struct nand_pos *pos);
 int nanddev_markbad(struct nand_device *nand, const struct nand_pos *pos);
 
 /* ECC related functions */