common/board_f.c: change the macro name and remove it for PPC platforms

For most PPC platforms, they will call the first get_clocks() in
init_sequence_f[] as they define CONFIG_PPC. CONFIG_SYS_FSL_CLK is
then defined to call the second get_clocks(), which should be
redundant for PPC.

Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/mx53ard.h b/include/configs/mx53ard.h
index be37ce5..fdb4134 100644
--- a/include/configs/mx53ard.h
+++ b/include/configs/mx53ard.h
@@ -23,7 +23,7 @@
 #define CONFIG_INITRD_TAG
 #define CONFIG_REVISION_TAG
 
-#define CONFIG_FSL_CLK
+#define CONFIG_SYS_FSL_CLK
 
 /* Size of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN		(CONFIG_ENV_SIZE + 2 * 1024 * 1024)