core: riscv: Include kernel/interrupt.h for thread_arch.c

Otherwise, the compiler can not find the declaration of
interrupt_main_handler().

Signed-off-by: Alvin Chang <alvinga@andestech.com>

core/arch/riscv/kernel/thread_arch.c

@@ -14,6 +14,7 @@
 #include <keep.h>
 #include <kernel/asan.h>
 #include <kernel/boot.h>
+#include <kernel/interrupt.h>
 #include <kernel/linker.h>
 #include <kernel/lockdep.h>
 #include <kernel/misc.h>