arch/x86: Indent using tabs not spaces

No functional changes - just whitespace fixes.
Signed-off-by: Martin Roth <martinroth@google.com>

Change-Id: I8ffa87240bcbd3d657ed9dc619b5e5bf9de734d7
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/12853
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/arch/x86/acpigen.c

@@ -653,7 +653,7 @@ void acpigen_write_resourcetemplate_footer(void)
 	acpigen_emit_byte(0x79);
 	acpigen_emit_byte(0x00);
 
-     	len = gencurrent - p;
+	len = gencurrent - p;
 
 	/* patch len word */
 	p[0] = len & 0xff;