x86: Move setup_pcat_compatibility() out of board.c

This function simply does not belong in board.c

--
Changes for v2:
 - Added commit message

diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c
index aaffd1b..416aa9e 100644
--- a/arch/x86/lib/board.c
+++ b/arch/x86/lib/board.c
@@ -486,10 +486,3 @@
 	for (;;)
 		;
 }
-
-void setup_pcat_compatibility(void)
-	__attribute__((weak, alias("__setup_pcat_compatibility")));
-
-void __setup_pcat_compatibility(void)
-{
-}
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index bb40517..2214286 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -314,6 +314,13 @@
 #endif
 }
 
+void setup_pcat_compatibility(void)
+	__attribute__((weak, alias("__setup_pcat_compatibility")));
+
+void __setup_pcat_compatibility(void)
+{
+}
+
 int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 {
 	struct boot_params *base_ptr;