ARM: OMAP2+: PM: VP: minor pr_warn updates

change pr_warnings to pr_warn and ensure a newline
is present in all messages

Cc: linux-omap@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>