MIPS: Malta: convert to generic board

This patch converts the MIPS Malta development board to make use of the
generic board code now that it is supported on MIPS.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

include/configs/malta.h

@@ -14,6 +14,9 @@
  * System configuration
  */
 #define CONFIG_MALTA
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_DISPLAY_BOARDINFO
 
 #define CONFIG_MEMSIZE_IN_BYTES