S5PC11X: JPEG: add ioctl to export memory configuration

This allows userspace libs3cjpeg to read memory configuration
from the kernel instead of using the hardcoded value.

Change-Id: I61248d659dbccf2e6cc656adc7fdf18773c2fcbd
mach-venturi: Reclaim more memory from reserved.
Revert "mach-venturi: Reclaim some MFC memory."

-OMX has trouble rendering video so out you go...

This reverts commit 25ebb9794af0a872353c48238aff6c65f0754d23.

Conflicts:

	arch/arm/mach-s5pv210/mach-venturi.c