nvme: introduce change ptpl and iekey definition

This is for the next tuning pr code more readble patch, make
linux/nvme.h's changes separately.

Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

include/linux/nvme.h

@@ -2171,4 +2171,13 @@ enum nvme_pr_release_action {
 	NVME_PR_RELEASE_ACT_CLEAR		= 1,
 };
 
+enum nvme_pr_change_ptpl {
+	NVME_PR_CPTPL_NO_CHANGE			= 0,
+	NVME_PR_CPTPL_RESV			= 1 << 30,
+	NVME_PR_CPTPL_CLEARED			= 2 << 30,
+	NVME_PR_CPTPL_PERSIST			= 3 << 30,
+};
+
+#define NVME_PR_IGNORE_KEY (1 << 3)
+
 #endif /* _LINUX_NVME_H */