configs/nitrogen8mn: Linux needs host-openssl

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/674934109

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/nitrogen8mn_defconfig

@@ -54,3 +54,4 @@ BR2_LINUX_KERNEL_DEFCONFIG="boundary"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="freescale/imx8mn-nitrogen8_nano freescale/imx8mn-nitrogen8mn freescale/imx8mn-nitrogen8mn_som"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y