remove BITS_TO_TYPE macro

remove BITS_TO_TYPE macro

I realized, that it is actually the same as DIV_ROUND_UP, use it instead.

[[email protected]: build fix]
Signed-off-by: Jiri Slaby <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 64b4641..acad110 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -6,6 +6,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/string.h>
+#include <linux/kernel.h>
 
 /*
  * bitmaps provide bit arrays that consume one or more unsigned