[ARM] Fix return value of arch_spin_lock_check()

The arch_spin_lock_check() should return TRUE if spinlock is locked and
should return FALSE if spinlock is available.

This patch fixes the return value of arch_spin_lock_check() in arm32 and
arm32ve as-per above described semantics.

Signed-off-by: Anup Patel <anup@brainfault.org>