[PATCH -next] phy: stm32: fix using 0 as NULL pointer warnings

[Wei Yongjun]

Fixes the following sparse warnings:

drivers/phy/st/phy-stm32-usbphyc.c:331:42: warning:
 Using plain integer as NULL pointer
drivers/phy/st/phy-stm32-usbphyc.c:344:52: warning:
 Using plain integer as NULL pointer

Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/phy/st/phy-stm32-usbphyc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/st/phy-stm32-usbphyc.c 
b/drivers/phy/st/phy-stm32-usbphyc.c
index bc4e78a..48d4086 100644
--- a/drivers/phy/st/phy-stm32-usbphyc.c
+++ b/drivers/phy/st/phy-stm32-usbphyc.c
@@ -328,7 +328,7 @@ static int stm32_usbphyc_probe(struct platform_device *pdev)
        if (IS_ERR(usbphyc->base))
                return PTR_ERR(usbphyc->base);
 
-       usbphyc->clk = devm_clk_get(dev, 0);
+       usbphyc->clk = devm_clk_get(dev, NULL);
        if (IS_ERR(usbphyc->clk)) {
                ret = PTR_ERR(usbphyc->clk);
                dev_err(dev, "clk get failed: %d\n", ret);
@@ -341,7 +341,7 @@ static int stm32_usbphyc_probe(struct platform_device *pdev)
                return ret;
        }
 
-       usbphyc->rst = devm_reset_control_get(dev, 0);
+       usbphyc->rst = devm_reset_control_get(dev, NULL);
        if (!IS_ERR(usbphyc->rst)) {
                reset_control_assert(usbphyc->rst);
                udelay(2);