.mailmap: Start to use new amd.com email address

Xilinx has been acquired by AMD that's why emails should be also updated.
The patch is updating .mailmap file and also MAINTAINERS files as was done
by commit 5cd1ecb99490 ("ppc: qemu: Update MAINTAINERS for correct email
address").
The rest of my emails are not going to change.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/board/xilinx/versal/MAINTAINERS b/board/xilinx/versal/MAINTAINERS
index bbab051..a13b656 100644
--- a/board/xilinx/versal/MAINTAINERS
+++ b/board/xilinx/versal/MAINTAINERS
@@ -1,5 +1,5 @@
 XILINX_VERSAL BOARDS
-M:	Michal Simek <michal.simek@xilinx.com>
+M:	Michal Simek <michal.simek@amd.com>
 S:	Maintained
 T:	git https://source.denx.de/u-boot/custodians/u-boot-microblaze.git
 F:	arch/arm/dts/versal*
diff --git a/board/xilinx/zynqmp/MAINTAINERS b/board/xilinx/zynqmp/MAINTAINERS
index 56c6379..17a2766 100644
--- a/board/xilinx/zynqmp/MAINTAINERS
+++ b/board/xilinx/zynqmp/MAINTAINERS
@@ -1,5 +1,5 @@
 XILINX_ZYNQMP BOARDS
-M:	Michal Simek <michal.simek@xilinx.com>
+M:	Michal Simek <michal.simek@amd.com>
 S:	Maintained
 T:	git https://source.denx.de/u-boot/custodians/u-boot-microblaze.git
 F:	arch/arm/dts/zynqmp-*
diff --git a/board/xilinx/zynqmp_r5/MAINTAINERS b/board/xilinx/zynqmp_r5/MAINTAINERS
index ac26764..aa50e6d 100644
--- a/board/xilinx/zynqmp_r5/MAINTAINERS
+++ b/board/xilinx/zynqmp_r5/MAINTAINERS
@@ -1,5 +1,5 @@
 XILINX_ZYNQMP_R5 BOARDS
-M:	Michal Simek <michal.simek@xilinx.com>
+M:	Michal Simek <michal.simek@amd.com>
 S:	Maintained
 F:	arch/arm/dts/zynqmp-r5*
 F:	board/xilinx/zynqmp_r5/