dts: am4372: Enable USB1 in SPL

USB1 can be used by the romboot on all am4372 platforms to download a
firmware (SPL in our case).
It makes sense to enable USB1 in the SPL to download u-boot.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
1 file changed