rockchip: rv1108: use common board file

Use common board file.

Change-Id: I5fefdfad9a2acdb837ffe15f93518dc26e08b9e7
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/mach-rockchip/rv1108/rv1108.c

@@ -5,11 +5,3 @@
  */
 
 #include <common.h>
-
-#ifndef CONFIG_SYS_DCACHE_OFF
-void enable_caches(void)
-{
-	/* Enable D-cache. I-cache is already enabled in start.S */
-	dcache_enable();
-}
-#endif

board/rockchip/evb_rv1108/evb_rv1108.c

@@ -30,12 +30,6 @@ int mach_cpu_init(void)
 	return 0;
 }
 
-
-int board_init(void)
-{
-	return 0;
-}
-
 int dram_init(void)
 {
 	gd->ram_size = 0x8000000;