flash: spi_nor: Convert FLASH_{WRITE,ERASE}_BLOCK_SIZE to DT_

Convert generic FLASH_{WRITE,ERASE}_BLOCK_SIZE to driver specific
generated define DT_JEDEC_SPI_NOR_0_{WRITE,ERASE}_BLOCK_SIZE.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
1 file changed