Fixes gcc '-Wunused-but-set-variable' warning:

drivers/crypto/xilinx/zynqmp-aes-gcm.c: In function 'zynqmp_aes_aead_cipher':
drivers/crypto/xilinx/zynqmp-aes-gcm.c:83:30: warning:
 variable 'drv_ctx' set but not used [-Wunused-but-set-variable]

commit bc86f9c54616 ("firmware: xilinx: Remove eemi ops for aes engine") left
behind this, remove it.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200505101200.195184-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Return value of AES PM API is not handled which may result in
unexpected value of "status" in zynqmp_pm_aes_engine().

Consider "status" value as valid only if AES PM API is successful.

Fixes: bc86f9c54616 ("firmware: xilinx: Remove eemi ops for aes engine")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Link: https://lore.kernel.org/r/1588330354-27942-1-git-send-email-rajan.vaja@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Use direct function call for aes engine instead of using eemi ops.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-20-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds AES driver support for the Xilinx ZynqMP SoC.

Signed-off-by: Mohan Marutirao Dhanawade <mohan.dhanawade@xilinx.com>
Signed-off-by: Kalyani Akula <kalyani.akula@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>