The argument 'force' enables a user to bypass the internal cache and read
a target register directly. However it is missing from the user guide.
Change-Id: I26f689eec20b38a0dc5294626b25df566b554446
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/1897
Tested-by: jenkins