sb/intel/bd82x6x: Use PCH_LPC_DEV macro

Change-Id: I681bb126546b5a7bda3f1bac05c345d2cf60b178
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49170
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>

src/southbridge/intel/bd82x6x/smihandler.c

@@ -70,7 +70,7 @@ void southbridge_gate_memory_reset(void)
 {
 	u16 gpiobase;
 
-	gpiobase = pci_read_config16(PCI_DEV(0, 0x1f, 0), GPIOBASE) & 0xfffc;
+	gpiobase = pci_read_config16(PCH_LPC_DEV, GPIOBASE) & 0xfffc;
 	if (!gpiobase)
 		return;