nvmem: zynqmp: Switch @xilinx.com emails to @amd.com

@xilinx.com is still working but better to switch to new amd.com after
AMD/Xilinx acquisition.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Message-ID: <20230611140330.154222-20-srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>