PCI: rcar-gen4: Make read-only const array check_addr static

Don't populate the const read-only array check_addr on the stack at
run time, instead make it static.

Link: https://lore.kernel.org/linux-pci/20240822205941.643187-1-colin.i.king@gmail.com
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
[kwilczynski: refactor array definition]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: ColinIanKing

drivers/pci/controller/dwc/pcie-rcar-gen4.c

@@ -606,7 +606,12 @@ static int rcar_gen4_pcie_reg_test_bit(struct rcar_gen4_pcie *rcar,
 static int rcar_gen4_pcie_download_phy_firmware(struct rcar_gen4_pcie *rcar)
 {
 	/* The check_addr values are magical numbers in the datasheet */
-	const u32 check_addr[] = { 0x00101018, 0x00101118, 0x00101021, 0x00101121};
+	static const u32 check_addr[] = {
+		0x00101018,
+		0x00101118,
+		0x00101021,
+		0x00101121,
+	};
 	struct dw_pcie *dw = &rcar->dw;
 	const struct firmware *fw;
 	unsigned int i, timeout;