x86: spl: Clear BSS unconditionally

This should be done even if not using TPL, since BSS may be in use or
boards that only use SPL. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/lib/spl.c b/arch/x86/lib/spl.c
index cf22fa2..6699de4 100644
--- a/arch/x86/lib/spl.c
+++ b/arch/x86/lib/spl.c
@@ -115,8 +115,8 @@
 	}
 
 #ifndef CONFIG_SYS_COREBOOT
-# ifndef CONFIG_TPL
 	memset(&__bss_start, 0, (ulong)&__bss_end - (ulong)&__bss_start);
+# ifndef CONFIG_TPL
 
 	/* TODO(sjg@chromium.org): Consider calling cpu_init_r() here */
 	ret = interrupt_init();