drm/amdkfd: Fix kernel queue 64 bit doorbell offset calculation

drm/amdkfd: Fix kernel queue 64 bit doorbell offset calculation

[ Upstream commit 951df6d9cfd07f205f1905bf3b27d994612e0614 ]

The bitmap index calculation should reverse the logic used on allocation
so it will clear the same bit used on allocation

Signed-off-by: Shaoyun Liu <Shaoyun.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>