OvmfPkg: Reduce PcdMaxVariableSize with secure boot to avoid assert

r14252 causes OVMF to crash if SECURE_BOOT_ENABLE is set,
because PcdMaxVariableSize is set to a larger value than
required. In other platforms, 0x2000 seems to be sufficient.

Reported-by: Gary Ching-Pang Lin <glin@suse.com>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14423 6f19259b-4bc3-4df7-8a09-765794883524
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index ace575a..7c8cd0d 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -277,7 +277,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxFvSupported|6

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeimPerFv|32

 !if $(SECURE_BOOT_ENABLE) == TRUE

-  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x10000

+  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x2000

 !else

   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x400

 !endif