mtd: rawnand: qcom: Delete an unneeded bool conversion

The result of an expression consisting of a single relational operator is
already of the bool type and does not need to be evaluated explicitly.

No functional change.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210510114944.3527-1-thunder.leizhen@huawei.com