Revert "OvmfPkg/QemuVideoDxe: Helper functions for unaligned port I/O."

Revert "OvmfPkg/QemuVideoDxe: Helper functions for unaligned port I/O."

This reverts commit 05a5379458725234de8a05780fcb5da2c12680e4.

The VMWare SVGA display device implemented by Qemu (-vga vmware) uses
an I/O-type BAR which is laid out such that some register offsets are
not aligned to the read/write width with which they are expected to be
accessed. However, we reverted the initialization of VMWare SVGA device,
we don't need such unaligned I/O.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: yuchenlin <yuchenlin@synology.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
(cherry picked from commit 438ada5aa5a1174940795678c2dae07cde8f3869)
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>