mtd: spi-nor: core: Make spi_nor_set_4byte_addr_mode_brwr public

This method can be retrieved at BFPT parsing time. The method is
described in JESD216 BFPT[SFDP_DWORD(16)], BIT(28) and BIT(20).
Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20230331074606.3559258-6-tudor.ambarus@linaro.orgSigned-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>

drivers/mtd/spi-nor/core.c

@@ -579,7 +579,7 @@ int spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(struct spi_nor *nor, bool enable)
  *
  * Return: 0 on success, -errno otherwise.
  */
-static int spi_nor_set_4byte_addr_mode_brwr(struct spi_nor *nor, bool enable)
+int spi_nor_set_4byte_addr_mode_brwr(struct spi_nor *nor, bool enable)
 {
 	int ret;
 

drivers/mtd/spi-nor/core.h

@@ -650,6 +650,7 @@ int spi_nor_write_disable(struct spi_nor *nor);
 int spi_nor_set_4byte_addr_mode_en4b_ex4b(struct spi_nor *nor, bool enable);
 int spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(struct spi_nor *nor,
 					       bool enable);
+int spi_nor_set_4byte_addr_mode_brwr(struct spi_nor *nor, bool enable);
 int spi_nor_wait_till_ready(struct spi_nor *nor);
 int spi_nor_global_block_unlock(struct spi_nor *nor);
 int spi_nor_prep_and_lock(struct spi_nor *nor);