fs/char_dev.c: fix incorrect documentation for unregister_chrdev_region
fs/char_dev.c: fix incorrect documentation for unregister_chrdev_region

The current documentation for unregister_chrdev_region says that it return
a range of device numbers which is incorrect.  Instead it unregister a
range of device numbers.  Fix the documentation to make this clear.

Signed-off-by: Partha Pratim Mukherjee <8db5615b6b89c5c32d59e212ff72b8010e14b992@gmail.com>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs