MdeModulePkg/Core/Dxe: log informative memprotect msgs at DEBUG_INFO level

In commit 7eb927db3e ("MdeModulePkg/DxeCore: implement memory protection
policy", 2017-02-24), we added two informative messages with the
InitializeDxeNxMemoryProtectionPolicy() function:

> InitializeDxeNxMemoryProtectionPolicy: applying strict permissions to
> active memory regions

and

> InitializeDxeNxMemoryProtectionPolicy: applying strict permissions to
> inactive memory regions

The messages don't report errors or warnings, thus downgrade their log
masks from DEBUG_ERROR to DEBUG_INFO.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1520485
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Star Zeng <star.zeng@intel.com>

MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c

@@ -831,8 +831,11 @@ InitializeDxeNxMemoryProtectionPolicy (
   } while (Status == EFI_BUFFER_TOO_SMALL);
   ASSERT_EFI_ERROR (Status);
 
-  DEBUG((DEBUG_ERROR, "%a: applying strict permissions to active memory regions\n",
-    __FUNCTION__));
+  DEBUG ((
+    DEBUG_INFO,
+    "%a: applying strict permissions to active memory regions\n",
+    __FUNCTION__
+    ));
 
   MergeMemoryMapForProtectionPolicy (MemoryMap, &MemoryMapSize, DescriptorSize);
 
@@ -856,9 +859,11 @@ InitializeDxeNxMemoryProtectionPolicy (
   // accessible, but have not been added to the UEFI memory map (yet).
   //
   if (GetPermissionAttributeForMemoryType (EfiConventionalMemory) != 0) {
-    DEBUG((DEBUG_ERROR,
+    DEBUG ((
+      DEBUG_INFO,
       "%a: applying strict permissions to inactive memory regions\n",
-      __FUNCTION__));
+      __FUNCTION__
+      ));
 
     CoreAcquireGcdMemoryLock ();