msm: vidc: fix kw issues

[1] pass __func__ to dprintk.
[2] move s_vpr_h to top of put_inst to avoid possible
    NULL ptr dereference.

Change-Id: Ic3f687cf540566574bd04599450f88264eb57864
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>