mtd: spi-nor: fix kernel-doc for spi_nor::info

When adding the 'info' field to 'struct spi_nor', some acronyms were in
lower case and some in upper case and the JEDEC acronym mistyped -- fix
these issues.

Fixes: 46dde01f ("mtd: spi-nor: add spi_nor_init() function")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>