nvme: Remove the redundant aqa value setting

AQA (Admin Queue Attributes) register is a dword size with
lower word of ASQS, and higher word of ACQS.

The code set the variable aqa twice, but it is redundant.
Signed-off-by: NWesley Sheng <wesleyshenggit@sina.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

drivers/nvme/nvme.c

@@ -387,7 +387,6 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
 
 	aqa = nvmeq->q_depth - 1;
 	aqa |= aqa << 16;
-	aqa |= aqa << 16;
 
 	dev->page_size = 1 << page_shift;