powerpc: MPC8555CDS: Remove macro CONFIG_MPC8555CDS

Use CONFIG_TARGET_MPC8555CDS instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/cpu/mpc85xx/pci.c b/arch/powerpc/cpu/mpc85xx/pci.c
index bf003a7..538729f 100644
--- a/arch/powerpc/cpu/mpc85xx/pci.c
+++ b/arch/powerpc/cpu/mpc85xx/pci.c
@@ -120,7 +120,7 @@
 
 	pci_register_hose(hose);
 
-#if defined(CONFIG_MPC8555CDS) || defined(CONFIG_TARGET_MPC8541CDS)
+#if defined(CONFIG_TARGET_MPC8555CDS) || defined(CONFIG_TARGET_MPC8541CDS)
 	/*
 	 * This is a SW workaround for an apparent HW problem
 	 * in the PCI controller on the MPC85555/41 CDS boards.