pl011: 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: I7a23327394d142af4b293ea7ccd90b843c54587c
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/hisilicon/hikey960/hikey960_pm.c b/plat/hisilicon/hikey960/hikey960_pm.c
index ede893e..9f96fc3 100644
--- a/plat/hisilicon/hikey960/hikey960_pm.c
+++ b/plat/hisilicon/hikey960/hikey960_pm.c
@@ -33,7 +33,7 @@
 #define AXI_CONF_BASE		0x820
 
 static unsigned int uart_base;
-static console_pl011_t console;
+static console_t console;
 static uintptr_t hikey960_sec_entrypoint;
 
 static void hikey960_pwr_domain_standby(plat_local_state_t cpu_state)