serial: stm32: add RTS support

Implement support of RTS in USART control register

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bich HEMON 2017-07-13 15:08:28 +00:00 • committed by Greg Kroah-Hartman
commit 35abe98f15