ARM change name of defines for AT91 arm926ejs

Configuration defines should be preceeded with CONFIG_SYS_. Renamed
some at91 specific defines to conform to this naming convention:

AT91_CPU_NAME to CONFIG_SYS_AT91_CPU_NAME
AT91_MAIN_CLOCK to CONFIG_SYS_AT91_MAIN_CLOCK

Signed-off-by: Achim Ehrlich <aehrlich@taskit.de>
diff --git a/include/configs/pm9261.h b/include/configs/pm9261.h
index 8ee132b..47bb8c0 100644
--- a/include/configs/pm9261.h
+++ b/include/configs/pm9261.h
@@ -31,14 +31,14 @@
 #define CONFIG_AT91_LEGACY
 
 /* ARM asynchronous clock */
-#define AT91_CPU_NAME		"AT91SAM9261"
+#define CONFIG_SYS_AT91_CPU_NAME	"AT91SAM9261"
 
 #define CONFIG_DISPLAY_BOARDINFO
 
 #define MASTER_PLL_DIV		15
 #define MASTER_PLL_MUL		162
 #define MAIN_PLL_DIV		2
-#define AT91_MAIN_CLOCK		18432000
+#define CONFIG_SYS_AT91_MAIN_CLOCK	18432000
 
 #define CONFIG_SYS_HZ		1000