hwclock: always reads hardware clock

hwclock: always reads hardware clock

It's a pity that hwclock first tries to read the clock when running

	hwclock --systohc --noadjfile --utc

and exits as this fails.  I cannot see a reason to read first in that
case.

Old version:

	# hwclock --systohc --noadjfile --utc --debug

	hwclock from util-linux-ng 2.14
	Using /dev interface to clock.
	Assuming hardware clock is kept in UTC time.
	Waiting for clock tick...
	/dev/rtc does not have interrupt functions. Waiting in loop for time
	from /dev/rtc to change
	...got clock tick
	Time read from Hardware Clock: 2008/06/17 11:18:24
	Hw clock time : 2008/06/17 11:18:24 = 1213701504 seconds since 1969
	Time elapsed since reference time has been 0.904855 seconds.
	Delaying further to reach the next full second.
	Setting Hardware Clock to 11:18:24 = 1213701504 seconds since 1969
	ioctl(RTC_SET_TIME) was successful.

New version:

	# hwclock --systohc --noadjfile --utc --debug

	hwclock from util-linux-ng 2.14
	Using /dev interface to clock.
	Assuming hardware clock is kept in UTC time.
	Time elapsed since reference time has been 0.572151 seconds.
	Delaying further to reach the next full second.
	Setting Hardware Clock to 11:18:52 = 1213701532 seconds since 1969
	ioctl(RTC_SET_TIME) was successful.

Addresses-Debian-Bug: #478663
Signed-off-by: Karel Zak <kzak@redhat.com>