OvmfPkg: Use FvLib from MdePkg

FvLib is moving from StandaloneMmPkg to MdePkg. FvLib is already
included from MdeLibs.dsc.inc. So, just remove the usage of FvLib
from StandaloneMmPkg.

Signed-off-by: Zhiguang Liu <[email protected]>

Author: LiuZhiguang001

OvmfPkg/OvmfPkgX64.dsc

@@ -541,7 +541,6 @@
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
   ExtractGuidedSectionLib|StandaloneMmPkg/Library/StandaloneMmExtractGuidedSectionLib/StandaloneMmExtractGuidedSectionLib.inf
-  FvLib|StandaloneMmPkg/Library/FvLib/FvLib.inf
   HobLib|StandaloneMmPkg/Library/StandaloneMmCoreHobLib/StandaloneMmCoreHobLib.inf
   MemoryAllocationLib|StandaloneMmPkg/Library/StandaloneMmCoreMemoryAllocationLib/StandaloneMmCoreMemoryAllocationLib.inf
   MemLib|StandaloneMmPkg/Library/StandaloneMmMemLib/StandaloneMmMemLib.inf