Some examples may require the usage of a second UART.
This adds UART1 to common launchxl.dtsi in order to make it
available for these examples.
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
This creates a common folder in order to share code between similar
boards. This is mostly for the CC1352P1 and CC1352P7 launchpad which
are very similar but it could be probably useful for some other boards.
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>