Disable OS crash mode memory allocation

By default 4MB was allocatd for OS crash mode support. Hoever, no
project is really using it at all. The default should be changed
not to reserve any memory for it. For platform needs it, it can
override using platform specific CFGDATA.

Signed-off-by: Maurice Ma <maurice.ma@intel.com>

Platform/CommonBoardPkg/CfgData/CfgData_Common.dsc

@@ -40,7 +40,7 @@
   # !BSF TYPE:{Combo}
   # !BSF OPTION:{ 0:0MB, 1:4MB, 2:8MB, 3:16MB, 4:32MB, 5:64MB}
   # !BSF HELP:{Specify reserved memory size for OS to save OS crash data. The reserved memory address should be same across reset.}
-  gCfgData.OsCrashMemorySize           |      * | 0x01 | 1
+  gCfgData.OsCrashMemorySize           |      * | 0x01 | 0
 
   # !BSF NAME:{Enable Crash Mode}
   # !BSF OPTION:{$EN_DIS}