drm/i915/dma: enforce pr_<loglevel> consistency

One branch of the if clause uses pr_info, the other pr_err; change
the 'false' branch to also use pr_info. This minor oversight has gone
unfixed since the initial vga_switcheroo implementation in 6a9ee8a.

Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446246960-22620-1-git-send-email-adi@adirat.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/i915_dma.c

@@ -367,7 +367,7 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_
 		i915_resume_switcheroo(dev);
 		dev->switch_power_state = DRM_SWITCH_POWER_ON;
 	} else {
-		pr_err("switched off\n");
+		pr_info("switched off\n");
 		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 		i915_suspend_switcheroo(dev, pmm);
 		dev->switch_power_state = DRM_SWITCH_POWER_OFF;