PCI: imx6: Consolidate redundant if-checks

Consolidated redundant if-checks pertaining to imx_pcie->phy. Instead of
two separate checks, merged them into one to improve code readability.

Link: https://lore.kernel.org/linux-pci/20240729-pci2_upstream-v8-8-b68ee5ef2b4d@nxp.com
Signed-off-by: Frank Li <Frank.Li@nxp.com>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Author: nxpfrankli

drivers/pci/controller/dwc/pci-imx6.c

@@ -948,9 +948,7 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp)
 			dev_err(dev, "pcie PHY power up failed\n");
 			goto err_clk_disable;
 		}
-	}
 
-	if (imx_pcie->phy) {
 		ret = phy_power_on(imx_pcie->phy);
 		if (ret) {
 			dev_err(dev, "waiting for PHY ready timeout!\n");