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/lib/libc/assert.c b/lib/libc/assert.c
index 2d2396c..fa12cb6 100644
--- a/lib/libc/assert.c
+++ b/lib/libc/assert.c
@@ -9,6 +9,7 @@
 #include <console.h>
 #include <debug.h>
 #include <platform.h>
+#include <stdio.h>
 
 /*
  * Only print the output if PLAT_LOG_LEVEL_ASSERT is higher or equal to
@@ -18,14 +19,14 @@
 #if PLAT_LOG_LEVEL_ASSERT >= LOG_LEVEL_VERBOSE
 void __assert(const char *file, unsigned int line, const char *assertion)
 {
-	tf_printf("ASSERT: %s:%d:%s\n", file, line, assertion);
+	printf("ASSERT: %s:%d:%s\n", file, line, assertion);
 	console_flush();
 	plat_panic_handler();
 }
 #elif PLAT_LOG_LEVEL_ASSERT >= LOG_LEVEL_INFO
 void __assert(const char *file, unsigned int line)
 {
-	tf_printf("ASSERT: %s:%d\n", file, line);
+	printf("ASSERT: %s:%d\n", file, line);
 	console_flush();
 	plat_panic_handler();
 }