src/cpu: Improve code formatting

Change-Id: I17d5efe382da5301a9f5d595186d0fb7576725ca
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16391
Tested-by: build bot (Jenkins)
Reviewed-by: Andrew Wu <arw@dmp.com.tw>
Reviewed-by: Antonello Dettori <dev@dettori.io>

src/cpu/x86/smm/smihandler.c

@@ -68,7 +68,7 @@ void io_trap_handler(int smif)
 	/* If a handler function handled a given IO trap, it
 	 * shall return a non-zero value
 	 */
-        printk(BIOS_DEBUG, "SMI function trap 0x%x: ", smif);
+	printk(BIOS_DEBUG, "SMI function trap 0x%x: ", smif);
 
 	if (southbridge_io_trap_handler(smif))
 		return;