mtd: spi-nor: rename .otp_org to .otp and make it a pointer

Move the OTP ops out of the flash_info structure. Besides of saving some
space, there will be a new macro SNOR_OTP() which can be used to set the
ops:
  .otp = SNOR_OTP(...),
Signed-off-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20230807-mtd-flash-info-db-rework-v3-14-e60548861b10@kernel.orgSigned-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>

drivers/mtd/spi-nor/core.c

@@ -2978,7 +2978,7 @@ static void spi_nor_init_default_params(struct spi_nor *nor)
 	struct device_node *np = spi_nor_get_flash_node(nor);
 
 	params->quad_enable = spi_nor_sr2_bit1_quad_enable;
-	params->otp.org = &info->otp_org;
+	params->otp.org = info->otp;
 
 	/* Default to 16-bit Write Status (01h) Command */
 	nor->flags |= SNOR_F_HAS_16BIT_SR;

drivers/mtd/spi-nor/core.h

@@ -557,7 +557,7 @@ struct flash_info {
 
 	u8 mfr_flags;
 
-	const struct spi_nor_otp_organization otp_org;
+	const struct spi_nor_otp_organization *otp;
 	const struct spi_nor_fixups *fixups;
 };
 
@@ -607,7 +607,7 @@ struct flash_info {
 		.flags = SPI_NOR_NO_ERASE | SPI_NOR_NO_FR,		\
 
 #define OTP_INFO(_len, _n_regions, _base, _offset)			\
-		.otp_org = {						\
+		.otp = &(const struct spi_nor_otp_organization){	\
 			.len = (_len),					\
 			.base = (_base),				\
 			.offset = (_offset),				\

drivers/mtd/spi-nor/winbond.c

@@ -217,7 +217,7 @@ static int winbond_nor_late_init(struct spi_nor *nor)
 {
 	struct spi_nor_flash_parameter *params = nor->params;
 
-	if (params->otp.org->n_regions)
+	if (params->otp.org)
 		params->otp.ops = &winbond_nor_otp_ops;
 
 	/*