devtools: enable more config options in build test

devtools: enable more config options in build test

The Linux kernel modules kni and igb_uio were disabled by default
so they need a new option (+kmods) for testing compilation.

Some recent features were not enabled in compilation testing:
	- mlx5 vDPA (depends on libibverbs)
	- ifpga (depends on libfdt)
	- ipn3ke (depends on libfdt)
	- Arm WFE

Check on libfdt availability is added, and not considered as a fix.

Fixes: 91a861e54164 ("config: disable Linux kernel modules by default")
Fixes: 95276abaaf0a ("vdpa/mlx5: introduce Mellanox vDPA driver")
Fixes: 1be7855d7739 ("eal: add wait until equal API")

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: David Marchand <david.marchand@redhat.com>