x86: Add some log categories

Add categories for i8259 and bios files, so that log statements have the
right category.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/lib/bios.c b/arch/x86/lib/bios.c
index 03f7360..acae635 100644
--- a/arch/x86/lib/bios.c
+++ b/arch/x86/lib/bios.c
@@ -5,6 +5,9 @@
  * Copyright (C) 2007 Advanced Micro Devices, Inc.
  * Copyright (C) 2009-2010 coresystems GmbH
  */
+
+#define LOG_CATEGRORY	LOGC_ARCH
+
 #include <compiler.h>
 #include <bios_emul.h>
 #include <irq_func.h>