ARM: shmobile: leave CONFIG_INOTIFY_USER enabled by default

CONFIG_INOTIFY_USER is enabled by default in its Kconfig. Disabling it
breaks udevd. Fix shmobile defconfig files to not specify this option
explicitly.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Simon Horman <horms@verge.net.au>