bpf/preload: Don't select USERMODE_DRIVER

[ Upstream commit 2b03164e ]

The usermode driver framework is not used anymore by the BPF
preload code.

Fixes: cb80ddc6 ("bpf: Convert bpf_preload.ko to use light skeleton.")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/bpf/20250721-remove-usermode-driver-v1-1-0d0083334382@linutronix.de


Signed-off-by: Sasha Levin <sashal@kernel.org>