tree a8a0ad5b68e411c2770ebae3e71835f5b1a62600
parent eba13277199b1195b78e47b6ea2e8745e7b66cd9
author Florian Vaussard <florian.vaussard@heig-vd.ch> 1493382635 +0200
committer Anas Nashif <nashif@linux.intel.com> 1494868974 -0400

arm: stm32f4: Do not enable USART1/USART2 by default

Not all the boards (for instance the Nuclo F412) use USART1 or USART2.
Let each board enable these USARTs when really used.

Change-Id: Idfe79c724bd7b1ab154310b4a8234b52eef2298d
Signed-off-by: Florian Vaussard <florian.vaussard@heig-vd.ch>