src/{device,drivers}: Use 'include <stdlib.h>' when appropriate

Also, including <types.h>, is supposed to provide stdint and stddef.

Change-Id: I99918a5a77e759bc7d4192d2c3fd6ad493c70248
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33681
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/drivers/spi/flashconsole.c

@@ -17,6 +17,8 @@
 #include <fmap.h>
 #include <console/console.h>
 #include <console/flash.h>
+#include <stdlib.h>
+#include <types.h>
 
 #define LINE_BUFFER_SIZE 128
 #define READ_BUFFER_SIZE 0x100