configs/nitrogen8m*: new uboot requires host ssl
Fixes: 8f75e63ec4 ("configs/nitrogen*: bump u-boot to version 2020.10")
https://gitlab.com/buildroot.org/buildroot/-/jobs/938922366
https://gitlab.com/buildroot.org/buildroot/-/jobs/938922367
https://gitlab.com/buildroot.org/buildroot/-/jobs/938922368
Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>