core: add common implementation for console_putc() and console_flush()

Since most platforms now use the same console_putc() and
console_flush(), move them to core/kernel/console.c. Make them __weak
so that platforms may still provide their own.
The common code expects the platforms to initialize whatever serial
device from console_init() and call register_console().

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/core/kernel/sub.mk b/core/kernel/sub.mk
index aa00ae59..963e0782 100644
--- a/core/kernel/sub.mk
+++ b/core/kernel/sub.mk
@@ -1,4 +1,5 @@
 srcs-y += assert.c
+srcs-y += console.c
 srcs-y += tee_ta_manager.c
 srcs-y += tee_misc.c
 srcs-y += panic.c