common: Drop linux/bitops.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/synopsys/emsdp/emsdp.c b/board/synopsys/emsdp/emsdp.c
index c1746b6..91fa94a 100644
--- a/board/synopsys/emsdp/emsdp.c
+++ b/board/synopsys/emsdp/emsdp.c
@@ -9,6 +9,7 @@
 #include <dwmmc.h>
 #include <init.h>
 #include <malloc.h>
+#include <linux/bitops.h>
 
 #include <asm/arcregs.h>