spe: 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: I75dbfafb67849833b3f7b5047e237651e3f553cd
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/nvidia/tegra/soc/t194/plat_setup.c b/plat/nvidia/tegra/soc/t194/plat_setup.c
index b9d5dfe..235fba4 100644
--- a/plat/nvidia/tegra/soc/t194/plat_setup.c
+++ b/plat/nvidia/tegra/soc/t194/plat_setup.c
@@ -163,7 +163,7 @@
 	uint32_t console_clock = 0U;
 
 #if ENABLE_CONSOLE_SPE
-	static console_spe_t spe_console;
+	static console_t spe_console;
 
 	if (id == TEGRA_CONSOLE_SPE_ID) {
 		(void)console_spe_register(TEGRA_CONSOLE_SPE_BASE,