x86: Allow a UART to be set up before the FSP is ready

Since the FSP is a black box it helps to have some sort of debugging
available to check its inputs. If the debug UART is in use, set it up
after CAR is available.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/lib/fsp/fsp_support.c b/arch/x86/lib/fsp/fsp_support.c
index 8b639f7..5f96da1 100644
--- a/arch/x86/lib/fsp/fsp_support.c
+++ b/arch/x86/lib/fsp/fsp_support.c
@@ -124,6 +124,10 @@
 	struct fsp_init_params *params_ptr;
 	struct upd_region *fsp_upd;
 
+#ifdef CONFIG_DEBUG_UART
+	setup_early_uart();
+#endif
+
 	fsp_hdr = find_fsp_header();
 	if (fsp_hdr == NULL) {
 		/* No valid FSP info header was found */