devm_clk_get() and devm_reset_control_get() expect a const char *id for
the last arg, but a value of zero was provided. This results in below
sparse warning:

drivers/phy/st/phy-stm32-usbphyc.c:330:42: warning: Using plain integer as NULL 
pointer
drivers/phy/st/phy-stm32-usbphyc.c:343:52: warning: Using plain integer as NULL 
pointer

Instead of zero, use NULL

Cc: Amelie Delaunay <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
---
 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 56bdea4b0bd9..2b3639cba51a 100644
--- a/drivers/phy/st/phy-stm32-usbphyc.c
+++ b/drivers/phy/st/phy-stm32-usbphyc.c
@@ -327,7 +327,7 @@ 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);
@@ -340,7 +340,7 @@ 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);
-- 
2.26.2

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