drm: sti: fix spelling mistake: rejec -> rejection

In other places of the driver the string hdmi_rejection_pll is
used instead of the truncated hdmi_rejec_pll, so use this string
instead to be consistent.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Philippe Cornu <philippe.cornu@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004082706.26478-1-colin.king@canonical.com

drivers/gpu/drm/sti/sti_hdmi.c

@@ -892,7 +892,7 @@ static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
 	if (clk_prepare_enable(hdmi->clk_tmds))
 		DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
 	if (clk_prepare_enable(hdmi->clk_phy))
-		DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
+		DRM_ERROR("Failed to prepare/enable hdmi_rejection_pll clk\n");
 
 	hdmi->enabled = true;