spi: img-spfi: Fix pm_runtime_get_sync() error checking

stable inclusion
from stable-v5.10.121
commit 172789fd9532ce34e12ae1f03608bb0475272adb
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=172789fd9532ce34e12ae1f03608bb0475272adb

--------------------------------

[ Upstream commit cc470d55 ]

If the device is already in a runtime PM enabled state
pm_runtime_get_sync() will return 1, so a test for negative
value should be used to check for errors.

Fixes: deba2580 ("spi: Add driver for IMG SPFI controller")
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20220422062641.10486-1-zhengyongjun3@huawei.comSigned-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/spi/spi-img-spfi.c

@@ -731,7 +731,7 @@ static int img_spfi_resume(struct device *dev)
 	int ret;
 
 	ret = pm_runtime_get_sync(dev);
-	if (ret) {
+	if (ret < 0) {
 		pm_runtime_put_noidle(dev);
 		return ret;
 	}