gpu: nova: Use module names consistently

gpu: nova: Use module names consistently

Update nova/Makefile and nova-core/Makefile so that nova-drm.ko and
nova-core.ko are produced, matching the module names set in patch 1.

Update drm::DriverInfo with the correct driver name and vendor
description. Fix Kconfig help text for both drivers and the debugfs
directory name in nova-core to match the new module names.

Closes: https://github.com/Rust-for-Linux/linux/issues/1228
Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Link: https://patch.msgid.link/20260507185012.1527139-3-yphbchou0911@gmail.com
[ Change commit subject to "gpu: nova: Use module names consistently";
  slightly adjust commit message. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>