libc: Use printf and snprintf across codebase

tf_printf and tf_snprintf are now called printf and snprintf, so the
code needs to be updated.

Change-Id: Iffeee97afcd6328c4c2d30830d4923b964682d71
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/imx/imx8qx/imx8qx_psci.c b/plat/imx/imx8qx/imx8qx_psci.c
index f1df267..46ea724 100644
--- a/plat/imx/imx8qx/imx8qx_psci.c
+++ b/plat/imx/imx8qx/imx8qx_psci.c
@@ -25,7 +25,7 @@
 
 	cpu_id = MPIDR_AFFLVL0_VAL(mpidr);
 
-	tf_printf("imx_pwr_domain_on cpu_id %d\n", cpu_id);
+	printf("imx_pwr_domain_on cpu_id %d\n", cpu_id);
 
 	if (sc_pm_set_resource_power_mode(ipc_handle, ap_core_index[cpu_id],
 	    SC_PM_PW_MODE_ON) != SC_ERR_NONE) {
@@ -61,7 +61,7 @@
 	plat_gic_cpuif_disable();
 	sc_pm_req_cpu_low_power_mode(ipc_handle, ap_core_index[cpu_id],
 		SC_PM_PW_MODE_OFF, SC_PM_WAKE_SRC_NONE);
-	tf_printf("turn off core:%d\n", cpu_id);
+	printf("turn off core:%d\n", cpu_id);
 }
 
 void imx_domain_suspend(const psci_power_state_t *target_state)