lib/thread: Switch to using types.h

thread_mutex uses bool.

BUG=b:179699789
TEST=Build guybrush

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Id26b37d3e38852d72fcb6ff07ed578b0879e55dd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58990
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Rob Barnes <robbarnes@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/thread.h

@@ -5,7 +5,7 @@
 #include <arch/cpu.h>
 #include <bootstate.h>
 #include <commonlib/bsd/cb_err.h>
-#include <stdint.h>
+#include <types.h>
 
 struct thread_mutex {
 	bool locked;