x86: Rename some FSP functions to have an fsp_ prefix

Given these exported function an fsp_ prefix since they are declared in an
fsp.h header.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/baytrail/fsp_configs.c b/arch/x86/cpu/baytrail/fsp_configs.c
index 5b5d66a..1d1948c 100644
--- a/arch/x86/cpu/baytrail/fsp_configs.c
+++ b/arch/x86/cpu/baytrail/fsp_configs.c
@@ -27,7 +27,7 @@
  * If the device tree does not specify an integer setting, use the default
  * provided in Intel's Baytrail_FSP_Gold4.tgz release FSP/BayleyBayFsp.bsf file.
  */
-void update_fsp_configs(struct fsp_config_data *config,
+void fsp_update_configs(struct fsp_config_data *config,
 			struct fspinit_rtbuf *rt_buf)
 {
 	struct upd_region *fsp_upd = &config->fsp_upd;