media: i2c: imx214: Move imx214_pll_update to imx214_ctrls_init

It is more logical to call the PLL update in imx214_ctrls_init(). So
let's move it there.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>