configs/orangepi_pc2: change /dev/ mangement to mdev

This is needed to auto-load some kernel modules needed for the HW to
work.

Signed-off-by: Javad Rahimi <javad321javad@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/orangepi_pc2_defconfig

@@ -2,6 +2,7 @@ BR2_aarch64=y
 BR2_ARM_FPU_VFPV4=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_1=y
 BR2_TARGET_GENERIC_ISSUE="Welcome to Orangepi PC2"
+BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/orangepi/common/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c $(BINARIES_DIR)/genimage.cfg"