spi25: Remove dead increment

Value stored in 'pos' is never read.

Found-by: scan-build 7.0.1-8
Change-Id: I9a70593f182d7558e71e831fc2b834ac58a25b2a
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/34404
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
1 file changed