media: i2c: imx214: Replace register addresses with macros

[ Upstream commit 341a133b ]

Define macros for all the known registers used in the register arrays,
and use them to replace the numerical addresses. This improves
readability.

Acked-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Stable-dep-of: acc29451 ("media: i2c: imx214: Fix link frequency validation")
Signed-off-by: Sasha Levin <sashal@kernel.org>