socfpga: correctly increment freeze_controller_base address

socfpga: correctly increment freeze_controller_base address

Correctly increment the base address of the freeze controller. And since
SYSMGR_FRZCTRL_VIOCTRL_SHIFT is not needed, remove it from the include file.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Vince Bridgers <vbridger@opensource.altera.com>
Cc: Chin Liang See <clsee@altera.com>
Cc: Marek Vasut <marex@denx.de>
Acked-by: Pavel Machek <pavel@denx.de>
Cc: Wolfgang Denk <wd@denx.de>