drivers/spi/spi_flash: remove spi flash names

The names of each spi flash cause quite a bit of bloat in the text
size of each stage/program. Remove the name entirely from spi flash
in order to reduce overhead. In order to pack space as closely as
possible the previous 32-bit id and mask were split into 2 16-bit
ids and masks.

On Chrome OS build of Aleena there's a savings of >2.21KiB in each
of verstage, romstage, and ramstage.

Change-Id: Ie98f7e1c7d116c5d7b4bf78605f62fee89dee0a5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38380
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/include/spi_flash.h

@@ -104,7 +104,6 @@ struct spi_flash {
 		};
 	} flags;
 	u16 model;
-	const char *name;
 	u32 size;
 	u32 sector_size;
 	u32 page_size;