phy: qcom: use struct_size instead of sizeof

Use struct_size() to get the accurate size of `clk_hw_onecell_data`
with a variable size array, instead of sizeof(data) to get the size
of a pointer.
Suggested-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: NGuo Zhengkui <guozhengkui@vivo.com>
Fixes: f199223c ("phy: qcom: Introduce new eDP PHY driver")
Reviewed-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211209032114.9416-1-guozhengkui@vivo.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-edp.c

@@ -571,7 +571,7 @@ static int qcom_edp_clks_register(struct qcom_edp *edp, struct device_node *np)
 	struct clk_init_data init = { };
 	int ret;
 
-	data = devm_kzalloc(edp->dev, sizeof(data), GFP_KERNEL);
+	data = devm_kzalloc(edp->dev, struct_size(data, hws, 2), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;