powerpc: T4080: Drop configuration for T4080

There is no T4080 target. Drop related macros.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c
index 9d81873..12001f8 100644
--- a/arch/powerpc/cpu/mpc85xx/fdt.c
+++ b/arch/powerpc/cpu/mpc85xx/fdt.c
@@ -512,7 +512,7 @@
 #endif
 
 #if defined(CONFIG_ARCH_T2080) || defined(CONFIG_ARCH_T4240) || \
-	defined(CONFIG_ARCH_T4160) || defined(CONFIG_PPC_T4080)
+	defined(CONFIG_ARCH_T4160)
 void fdt_fixup_dma3(void *blob)
 {
 	/* the 3rd DMA is not functional if SRIO2 is chosen */
@@ -529,8 +529,7 @@
 	case 0x29:
 	case 0x2d:
 	case 0x2e:
-#elif defined(CONFIG_ARCH_T4240) || defined(CONFIG_ARCH_T4160) || \
-	defined(CONFIG_PPC_T4080)
+#elif defined(CONFIG_ARCH_T4240) || defined(CONFIG_ARCH_T4160)
 	u32 srds_prtcl_s4 = in_be32(&gur->rcwsr[4]) &
 				    FSL_CORENET2_RCWSR4_SRDS4_PRTCL;
 	srds_prtcl_s4 >>= FSL_CORENET2_RCWSR4_SRDS4_PRTCL_SHIFT;