tool: Move ALIGN_MASK to header as common MACRO

The ALIGN code is need by many files who need handle structure or image
align, so move the macro to imagetool.h file.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Punit Agrawal <punit1.agrawal@toshiba.co.jp>
Reviewed-by: Tom Rini <trini@konsulko.com>
5 files changed