Kernel 4.17.4 contains commit 32c319d4f120 ("pinctrl: devicetree: Fix
pctldev pointer overwrite"), which fixes camera support
on imx6-sabresd board, so bump to this kernel version.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>