rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/bf537-stamp/spi_flash.c b/board/bf537-stamp/spi_flash.c
index 7c73ddd..11a2803 100644
--- a/board/bf537-stamp/spi_flash.c
+++ b/board/bf537-stamp/spi_flash.c
@@ -412,7 +412,7 @@
  */
 void spi_init_r(void)
 {
-#if defined(CONFIG_POST) && (CONFIG_POST & CFG_POST_SPI)
+#if defined(CONFIG_POST) && (CONFIG_POST & CONFIG_SYS_POST_SPI)
 	/* Our testing strategy here is pretty basic:
 	 *  - fill src memory with an 8-bit pattern
 	 *  - write the src memory to the SPI flash