nb/intel/sandybridge: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: If36a879fbe7a93a214d74dbfa6fb3ee2d09a044a
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26454
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/northbridge/intel/sandybridge/pcie.c

@@ -48,7 +48,7 @@ static const char *pcie_acpi_name(const struct device *dev)
 			return "PEG6";
 		};
 
-	const device_t port = dev->bus->dev;
+	struct device *const port = dev->bus->dev;
 	assert(port);
 	assert(port->bus);