mm-video: venc: Correct a typo in variable name

A kernel variable was to be defined as unsigned long but
it is mistakenly defined as unsigned only, the space is
missing after long. This bug is silent because unsigned
is also a valid data type by itself.
Corresponding to kernel fix, similar correction is done
in userspace code.

Change-Id: I561f1cadc0d06c2b2289dae0cb1be527f9bcd844
mm-video: Add the ability to use PMEM while using TARGET_USES_ION := true