.mailmap: Map all Xilinx users mail ids to AMD

The mail ids of all the current Xilinx users are to be mapped to AMD
following the merger with AMD. The mailmap file is updated accordingly.

The ids of Marek Behún and Michal Simek are taken as reference.

Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally@amd.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Link: https://lore.kernel.org/r/20230426060104.10412-3-ashok.reddy.soma@amd.com


Signed-off-by: Michal Simek <michal.simek@amd.com>