soc/intel/common/block/cpu/car/exit_car_fsp.S: Align stack

Change-Id: I6b5864cfb9b013559cd318bc01733ba4d3792e65
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59914
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/intel/common/block/cpu/car/exit_car_fsp.S

@@ -18,6 +18,8 @@ chipset_teardown_car:
 
 	/* Set up new stack. */
 	mov	post_car_stack_top, %esp
+	/* Align the stack. */
+	andl	$0xfffffff0, %esp
 
 	/* Call C code */
 	call	main