mtd: spi-nor: Fix call trace when qspi driver built as module

When spi-nor and zynqmp qspi driver are built as modules, call trace was
observed while loading the modules. With this fix call trace issue is resolved.
Signed-off-by: NAmit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>

drivers/mtd/spi-nor/spi-nor.c

@@ -2484,7 +2484,7 @@ static struct spi_nor_fixups gd25q256_fixups = {
  * For historical (and compatibility) reasons (before we got above config) some
  * old entries may be missing 4K flag.
  */
-static const struct flash_info spi_nor_ids[] = {
+static struct flash_info spi_nor_ids[] = {
 	/* Atmel -- some are (confusingly) marketed as "DataFlash" */
 	{ "at25fs010",  INFO(0x1f6601, 0, 32 * 1024,   4, SECT_4K) },
 	{ "at25fs040",  INFO(0x1f6604, 0, 64 * 1024,   8, SECT_4K) },