powerpc: mpc83xx: Fix MPC8308 IMMR memory layout

The MPC8308 has two I2C controllers, but no PCI controller.

Fix the register map layout for this SoC.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/cpu/mpc83xx/Makefile b/arch/powerpc/cpu/mpc83xx/Makefile
index aa4affa..3040299 100644
--- a/arch/powerpc/cpu/mpc83xx/Makefile
+++ b/arch/powerpc/cpu/mpc83xx/Makefile
@@ -29,7 +29,9 @@
 obj-y += ecc.o
 obj-$(CONFIG_QE) += qe_io.o
 obj-$(CONFIG_FSL_SERDES) += serdes.o
+ifndef CONFIG_ARCH_MPC8308
 obj-$(CONFIG_PCI) += pci.o
+endif
 obj-$(CONFIG_PCIE) += pcie.o
 obj-$(CONFIG_OF_LIBFDT) += fdt.o