board: skyworth: Remove <common.h> and add needed includes

Remove <common.h> from this board vendor directory and when needed
add missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/skyworth/hc2910-2aghd05/hc2910-2aghd05.c b/board/skyworth/hc2910-2aghd05/hc2910-2aghd05.c
index abad5ef..22be10d 100644
--- a/board/skyworth/hc2910-2aghd05/hc2910-2aghd05.c
+++ b/board/skyworth/hc2910-2aghd05/hc2910-2aghd05.c
@@ -3,7 +3,6 @@
  * Board init file for Skyworth HC2910 2AGHD05
  */
 
-#include <common.h>
 #include <fdtdec.h>
 #include <init.h>
 #include <asm/system.h>