drm/amdkfd: Export the cwsr_size and ctl_stack_size to userspace

drm/amdkfd: Export the cwsr_size and ctl_stack_size to userspace

commit 8fc2796dea6f1210e1a01573961d5836a7ce531e upstream.

This is important for userspace to avoid hardcoding VGPR size.

Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 71776e0965f9f730af19c5f548827f2a7c91f5a8)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>