bitmap: replace _reg_op(REG_OP_RELEASE) with bitmap_clear()

_reg_op(REG_OP_RELEASE) duplicates bitmap_clear().

CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Yury Norov <yury.norov@gmail.com>

lib/bitmap.c

@@ -821,7 +821,7 @@ EXPORT_SYMBOL(bitmap_find_free_region);
  */
 void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order)
 {
-	__reg_op(bitmap, pos, order, REG_OP_RELEASE);
+	bitmap_clear(bitmap, pos, BIT(order));
 }
 EXPORT_SYMBOL(bitmap_release_region);