video: Drop unnecessary truetype operations from SPL

Saving and restoring entries is used for expo and for the command line,
which we don't use in SPL. Drop these methods.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
diff --git a/drivers/video/console_truetype.c b/drivers/video/console_truetype.c
index 14fb81e..6021335 100644
--- a/drivers/video/console_truetype.c
+++ b/drivers/video/console_truetype.c
@@ -8,6 +8,7 @@
 #include <dm.h>
 #include <log.h>
 #include <malloc.h>
+#include <spl.h>
 #include <video.h>
 #include <video_console.h>
 
@@ -799,6 +800,9 @@
 	struct console_tt_store store;
 	const uint size = sizeof(store);
 
+	if (spl_phase() <= PHASE_SPL)
+		return -ENOSYS;
+
 	/*
 	 * store the whole priv structure as it is simpler that picking out
 	 * what we need
@@ -820,6 +824,9 @@
 	struct console_tt_priv *priv = dev_get_priv(dev);
 	struct console_tt_store store;
 
+	if (spl_phase() <= PHASE_SPL)
+		return -ENOSYS;
+
 	memcpy(&store, abuf_data(buf), sizeof(store));
 
 	vc_priv->xcur_frac = store.cur.xpos_frac;
@@ -844,6 +851,9 @@
 	uint out, val;
 	int ret;
 
+	if (spl_phase() <= PHASE_SPL)
+		return -ENOSYS;
+
 	if (!visible)
 		return 0;