drm/amdgpu: fix regression in vbios reservation handling on headless

[ Upstream commit 7eded018bfeccb365963bb51be731a9f99aeea59 ]

We need to move the check under the non-headless case, otherwise
we always reserve the VGA save size.

Fixes: 157fe68d74c2ad ("drm/amdgpu: fix size calculation with stolen vga memory")
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
1 file changed