xilinx: common: Separate display cpu info function

Move the print_cpuinfo function of CONFIG_DISPLAY_CPUINFO into its own
source file to support reuse by other board vendors.

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Link: https://lore.kernel.org/r/20220620163650.18756-10-stefan.herbrechtsmeier-oss@weidmueller.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/board/xilinx/common/Makefile b/board/xilinx/common/Makefile
index 2120284..cdc3c96 100644
--- a/board/xilinx/common/Makefile
+++ b/board/xilinx/common/Makefile
@@ -5,6 +5,9 @@
 #
 
 obj-y	+= board.o
+ifndef CONFIG_ARCH_ZYNQ
+obj-$(CONFIG_DISPLAY_CPUINFO) += cpu-info.o
+endif
 ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_CMD_FRU) += fru.o fru_ops.o
 endif