mtd: fsmc_nand: fix handling of wait_for_completion_timeout return value

wait_for_completion_timeout does not return negative values so
result handling here does not need to check for negative return.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
1 file changed