bitmap-str: Get rid of 'extern' for function prototypes

The bitmap-str.h uses mixed style for function prototypes. Drop
the 'extern' as it easier to read and makes style aligned with
a new code in the kernel.

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

Author: andy-shev

include/linux/bitmap-str.h

@@ -4,10 +4,10 @@
 
 int bitmap_parse_user(const char __user *ubuf, unsigned int ulen, unsigned long *dst, int nbits);
 int bitmap_print_to_pagebuf(bool list, char *buf, const unsigned long *maskp, int nmaskbits);
-extern int bitmap_print_bitmask_to_buf(char *buf, const unsigned long *maskp,
-					int nmaskbits, loff_t off, size_t count);
-extern int bitmap_print_list_to_buf(char *buf, const unsigned long *maskp,
-					int nmaskbits, loff_t off, size_t count);
+int bitmap_print_bitmask_to_buf(char *buf, const unsigned long *maskp, int nmaskbits,
+				loff_t off, size_t count);
+int bitmap_print_list_to_buf(char *buf, const unsigned long *maskp, int nmaskbits,
+			     loff_t off, size_t count);
 int bitmap_parse(const char *buf, unsigned int buflen, unsigned long *dst, int nbits);
 int bitmap_parselist(const char *buf, unsigned long *maskp, int nmaskbits);
 int bitmap_parselist_user(const char __user *ubuf, unsigned int ulen,