mtd: spi-nor: Fix direction of the write_sr() transfer

write_sr() sends data to the SPI memory, fix the direction.

Fixes: b35b9a10362d ("mtd: spi-nor: Move m25p80 code in spi-nor.c")
Reported-by: John Garry <[e-mail]>
Signed-off-by: Tudor Ambarus <[e-mail]>
Tested-by: John Garry <[e-mail]>
Acked-by: Vignesh Raghavendra <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>

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

···
 			SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR, 1),
 				   SPI_MEM_OP_NO_ADDR,
 				   SPI_MEM_OP_NO_DUMMY,
-				   SPI_MEM_OP_DATA_IN(1, nor->bouncebuf, 1));
+				   SPI_MEM_OP_DATA_OUT(1, nor->bouncebuf, 1));
 
 		return spi_mem_exec_op(nor->spimem, &op);
 	}