Revert "OvmfPkg/QemuVideoDxe: VMWare SVGA device support"

This reverts commit c137d95081.

The VMWare SVGA model now -- since commit 104bd1dc70 in QEMU --
falls back to stdvga (that is, Bochs) if we don't setup VMWare SVGA
FIFO.

To simplify QemuVideoDxe, we don't intend to implement the VMWare SVGA
FIFO setup feature. It means our current VMW SVGA driver code is
basically dead. To simplify the problem, we will replace the old
VMWare SVGA driver to Bochs interface. It should work on all QEMU
version.

The first step for using Bochs interface is to revert old driver.

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>

OvmfPkg/QemuVideoDxe/Qemu.h

@@ -92,7 +92,6 @@ typedef enum {
   QEMU_VIDEO_CIRRUS_5446,
   QEMU_VIDEO_BOCHS,
   QEMU_VIDEO_BOCHS_MMIO,
-  QEMU_VIDEO_VMWARE_SVGA,
 } QEMU_VIDEO_VARIANT;
 
 typedef struct {
@@ -117,13 +116,10 @@ typedef struct {
   //
   UINTN                                 MaxMode;
   QEMU_VIDEO_MODE_DATA                  *ModeData;
-  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *VmwareSvgaModeInfo;
 
   QEMU_VIDEO_VARIANT                    Variant;
   FRAME_BUFFER_CONFIGURE                *FrameBufferBltConfigure;
   UINTN                                 FrameBufferBltConfigureSize;
-  UINT8                                 FrameBufferVramBarIndex;
-  UINT16                                VmwareSvgaBasePort;
 } QEMU_VIDEO_PRIVATE_DATA;
 
 ///
@@ -507,34 +503,9 @@ QemuVideoBochsModeSetup (
   BOOLEAN                  IsQxl
   );
 
-EFI_STATUS
-QemuVideoVmwareSvgaModeSetup (
-  QEMU_VIDEO_PRIVATE_DATA *Private
-  );
-
 VOID
 InstallVbeShim (
   IN CONST CHAR16         *CardName,
   IN EFI_PHYSICAL_ADDRESS FrameBufferBase
   );
-
-VOID
-VmwareSvgaWrite (
-  QEMU_VIDEO_PRIVATE_DATA *Private,
-  UINT16                  Register,
-  UINT32                  Value
-  );
-
-UINT32
-VmwareSvgaRead (
-  QEMU_VIDEO_PRIVATE_DATA *Private,
-  UINT16                  Register
-  );
-
-VOID
-InitializeVmwareSvgaGraphicsMode (
-  QEMU_VIDEO_PRIVATE_DATA  *Private,
-  QEMU_VIDEO_BOCHS_MODES   *ModeData
-  );
-
 #endif