BaseTools: GenFfs/GenFv/GenSec: Fixing Warning 4319 from MSVC

This change fixes a warning newly emitted by the latest MSVC, which now
treats this warning as an error and causes the build to fail.

This change aligns operand types in bitwise expressions by casting sizeof
results to UINT32, and promoting a UINT32 to UINTN where required to
correctly apply the bitmask.

Signed-off-by: Kun Qin <kun.qin@microsoft.com>