LS 16550: Use generic console_t data structure

Since now the generic console_t structure holds the UART base address as
well, let's use that generic location and drop the UART driver specific
data structure at all.

Change-Id: Ifd6aff1064ba1c3c029cdd8a83f715f7a9976db5
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/layerscape/common/tsp/ls_tsp_setup.c b/plat/layerscape/common/tsp/ls_tsp_setup.c
index f3b6027..969d0b8 100644
--- a/plat/layerscape/common/tsp/ls_tsp_setup.c
+++ b/plat/layerscape/common/tsp/ls_tsp_setup.c
@@ -30,7 +30,7 @@
  ******************************************************************************/
 void ls_tsp_early_platform_setup(void)
 {
-	static console_ls_16550_t console;
+	static console_t console;
 	/*
 	 * Initialize a different console than already in use to display
 	 * messages from TSP