intel/pci: Utilise pci_def.h for PCI_BRIDGE_CONTROL

This is a PCI standard register, no need to alias its
definitions under different names.

Change-Id: Iea6b198dd70fe1e49b5dc0824dba62628dedc69a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35521
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/southbridge/intel/ibexpeak/pch.h

@@ -82,10 +82,6 @@ void pch_enable(struct device *dev);
 #define SMLT	0x1b
 #define SECSTS	0x1e
 #define INTR	0x3c
-#define BCTRL	0x3e
-#define   SBR	(1 << 6)
-#define   SEE	(1 << 1)
-#define   PERE	(1 << 0)
 
 #define PCH_EHCI1_DEV		PCI_DEV(0, 0x1d, 0)
 #define PCH_EHCI2_DEV		PCI_DEV(0, 0x1a, 0)