ppc: qemu: Move board directory from board/freescale to board/emulation

board/emulation is the place for other QEMU targets like x86, arm,
riscv. Let's move the qemu-ppce500 board codes there.

List me as a co-maintainer for this board.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/board/emulation/qemu-ppce500/MAINTAINERS b/board/emulation/qemu-ppce500/MAINTAINERS
new file mode 100644
index 0000000..7317983
--- /dev/null
+++ b/board/emulation/qemu-ppce500/MAINTAINERS
@@ -0,0 +1,7 @@
+QEMU-PPCE500 BOARD
+M:	Alexander Graf <agraf@csgraf.de>
+M:	Bin Meng <bmeng.cn@gmail.com>
+S:	Maintained
+F:	board/emulation/qemu-ppce500/
+F:	include/configs/qemu-ppce500.h
+F:	configs/qemu-ppce500_defconfig