Grow_reshape: set only component_size for size grow

Grow_reshape: set only component_size for size grow

Component_size couldn't be set using ioctl when new drive size is big
(e.g. 5TB). Command value is bigger than 32 bits and error is reported
- it is known ioctl limitation. Remove updating array properties using
ioctl, use sysfs instead. Sysfs was introduced in 3.10, so now it is old
enough to be safely used. Array_size in sysfs should be set for every
size change for external metadata, when grow is performed without
errors.

Signed-off-by: Kinga Stefaniuk <kinga.stefaniuk@intel.com>