lib/malloc: Drop <cpu/x86/smm.h> include

Change-Id: I39b8dc37219195e88ea6396aa7e987e5e244bbab
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42385
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/lib/malloc.c

@@ -1,6 +1,5 @@
 #include <stdlib.h>
 #include <console/console.h>
-#include <cpu/x86/smm.h>
 
 #if CONFIG(DEBUG_MALLOC)
 #define MALLOCDBG(x...) printk(BIOS_SPEW, x)