OpenCoreMisc: Support ConsoleMode configuration option

Docs/Configuration.tex

@@ -1206,6 +1206,15 @@ behaviour that does not go to any other sections
 
 \begin{enumerate}
 
+\item
+  \texttt{ConsoleMode}\\
+  \textbf{Type}: \texttt{plist\ string}\\
+  \textbf{Default value}: Empty string\\
+  \textbf{Description}: Sets console output mode as specified
+  with the \texttt{WxH} (e.g. \texttt{80x24}) formatted string.
+  Set to empty string not to change console mode. Set to \texttt{Max}
+  to try to use largest available console mode.
+
 \item
   \texttt{HideSelf}\\
   \textbf{Type}: \texttt{plist\ boolean}\\

Docs/Sample.plist

@@ -353,6 +353,8 @@
 	<dict>
 		<key>Boot</key>
 		<dict>
+			<key>ConsoleMode</key>
+			<string></string>
 			<key>HideSelf</key>
 			<true/>
 			<key>ReinstallProtocol</key>

Platform/OpenCore/OpenCoreMisc.c

@@ -209,5 +209,36 @@ OcMiscLateInit (
       ));
   }
 
+  ParseConsoleMode (
+    OC_BLOB_GET (&Config->Misc.Boot.ConsoleMode),
+    &Width,
+    &Height,
+    &SetMax
+    );
+
+  DEBUG ((
+    DEBUG_INFO,
+    "OC: Requested console mode is %u:%u@%u (max: %d) from %a\n",
+    Width,
+    Height,
+    Bpp,
+    SetMax,
+    OC_BLOB_GET (&Config->Misc.Boot.ConsoleMode)
+    ));
+
+  if (SetMax || (Width > 0 && Height > 0)) {
+    Status = SetConsoleMode (Width, Height);
+    DEBUG ((
+      EFI_ERROR (Status) ? DEBUG_WARN : DEBUG_INFO,
+      "OC: Changed console mode to %u:%u@%u (max: %d) from %a - %r\n",
+      Width,
+      Height,
+      Bpp,
+      SetMax,
+      OC_BLOB_GET (&Config->Misc.Boot.ConsoleMode),
+      Status
+      ));
+  }
+
   return Status;
 }