ppc4xx: ML507: U-Boot in flash and System ACE

This patch allows booting from FLASH the ML507 board by Xilinx.
Previously, U-Boot needed to be loaded from JTAG or a Sytem ACE CF

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@uam.es>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/xilinx/ml507/init.S b/board/xilinx/ml507/init.S
index f54d929..3228a65 100644
--- a/board/xilinx/ml507/init.S
+++ b/board/xilinx/ml507/init.S
@@ -35,13 +35,19 @@
 	/* PIC */
 tlbentry(XPAR_INTC_0_BASEADDR, SZ_64K, XPAR_INTC_0_BASEADDR, 0,
 	 AC_R | AC_W | SA_G | SA_I)
+#ifdef XPAR_IIC_EEPROM_BASEADDR
 	/* I2C */
 tlbentry(XPAR_IIC_EEPROM_BASEADDR, SZ_64K, XPAR_IIC_EEPROM_BASEADDR, 0,
 	 AC_R | AC_W | SA_G | SA_I)
+#endif
+#ifdef XPAR_LLTEMAC_0_BASEADDR
 	/* Net */
 tlbentry(XPAR_LLTEMAC_0_BASEADDR, SZ_64K, XPAR_LLTEMAC_0_BASEADDR, 0,
 	 AC_R | AC_W | SA_G | SA_I)
+#endif
+#ifdef XPAR_FLASH_MEM0_BASEADDR
 	/*Flash*/
 tlbentry(XPAR_FLASH_MEM0_BASEADDR, SZ_256M, XPAR_FLASH_MEM0_BASEADDR, 0,
-	AC_R | AC_W | SA_G | SA_I)
+	 AC_R | AC_W | AC_X | SA_G | SA_I)
+#endif
 tlbtab_end