lib/bitmap.c: bitmap_[empty,full]: remove code duplication

bitmap_empty() has its own implementation.  But it's clearly as simple as:

	find_first_bit(src, nbits) == nbits

The same is true for 'bitmap_full'.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Cc: George Spelvin <linux@horizon.com>
Cc: Alexey Klimov <klimov.linux@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index be4fa5d..ea17cca 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -283,16 +283,16 @@
 {
 	if (small_const_nbits(nbits))
 		return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
-	else
-		return __bitmap_empty(src, nbits);
+
+	return find_first_bit(src, nbits) == nbits;
 }
 
 static inline int bitmap_full(const unsigned long *src, unsigned int nbits)
 {
 	if (small_const_nbits(nbits))
 		return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
-	else
-		return __bitmap_full(src, nbits);
+
+	return find_first_zero_bit(src, nbits) == nbits;
 }
 
 static inline int bitmap_weight(const unsigned long *src, unsigned int nbits)