arch/riscv/trap_handler: add missing types.h include

Both bool and uintptr_t types are used in this file, so include types.h
to have the definitions.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I647d9f50cd6edaf08bebf5d713cd05731fadfc1b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57722
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/arch/riscv/trap_handler.c

@@ -9,6 +9,7 @@
 #include <vm.h>
 #include <mcall.h>
 #include <sbi.h>
+#include <types.h>
 
 static const char *const exception_names[] = {
 	"Instruction address misaligned",