PCI: altera: Fix bool initialization in tlp_read_packet()

Bool variables should be initialized only through true and false
values; update tlp_read_packet() code to comply.

Detected using the Coccinelle tool.

Fixes: eaa6111b ("PCI: altera: Add Altera PCIe host controller driver")
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NLey Foon Tan <ley.foon.tan@intel.com>

drivers/pci/host/pcie-altera.c

@@ -145,7 +145,7 @@ static bool altera_pcie_valid_device(struct altera_pcie *pcie,
 static int tlp_read_packet(struct altera_pcie *pcie, u32 *value)
 {
 	int i;
-	bool sop = 0;
+	bool sop = false;
 	u32 ctrl;
 	u32 reg0, reg1;
 	u32 comp_status = 1;