rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/xilinx/ppc440-generic/xilinx_ppc440_generic.c b/board/xilinx/ppc440-generic/xilinx_ppc440_generic.c
index 0867226..0c3d667 100644
--- a/board/xilinx/ppc440-generic/xilinx_ppc440_generic.c
+++ b/board/xilinx/ppc440-generic/xilinx_ppc440_generic.c
@@ -37,7 +37,7 @@
 phys_size_t __initdram(int board_type)
 {
 	return get_ram_size(XPAR_DDR2_SDRAM_MEM_BASEADDR,
-			    CFG_SDRAM_SIZE_MB * 1024 * 1024);
+			    CONFIG_SYS_SDRAM_SIZE_MB * 1024 * 1024);
 }
 phys_size_t initdram(int) __attribute__((weak, alias("__initdram")));