livepatch: Rename KLP_* to KLP_TRANSITION_*

The original macros of KLP_* is about the state of the transition.
Rename macros of KLP_* to KLP_TRANSITION_* to fix the confusing
description of klp transition state.

Signed-off-by: Wardenjohn <zhangwarden@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lore.kernel.org/r/20240507050111.38195-2-zhangwarden@gmail.com
Signed-off-by: Petr Mladek <pmladek@suse.com>