spi/qspi: cleanup pm_runtime error check.
spi/qspi: cleanup pm_runtime error check.

clean up pm_runtime error check in accordance with rest of the check in
the driver.

Signed-off-by: Sourav Poddar <622174b0059324e3873cdaa4bff5b59554c7d88a@ti.com>
Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs