arm64: zynqmp: Create vck190 spl link for revB

vck190 system controller low level setup is the same for revB that's why
also create symlink to revA.

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

diff --git a/board/xilinx/zynqmp/zynqmp-e-a2197-00-revB b/board/xilinx/zynqmp/zynqmp-e-a2197-00-revB
new file mode 120000 (symlink)
index 0000000..15ccce3
--- /dev/null
+++ b/board/xilinx/zynqmp/zynqmp-e-a2197-00-revB
@@ -0,0 +1 @@
+zynqmp-e-a2197-00-revA
\ No newline at end of file