drm/sti/sti_hdmi: Move 'colorspace_mode_names' array to where its used

Fixes the following W=1 kernel build warning(s):

drivers/gpu/drm/sti/sti_hdmi.h:36:40: warning: ‘colorspace_mode_names’ defined but not used [-Wunused-const-variable=]
36 | static const struct drm_prop_enum_list colorspace_mode_names[] = {
| ^~~~~~~~~~~~~~~~~~~~~

Cc: Benjamin Gaignard <[e-mail]>
Cc: Vincent Abriou <[e-mail]>
Cc: David Airlie <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: Philipp Zabel <[e-mail]>
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Sam Ravnborg <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/sti/sti_hdmi.c

···
 #define to_sti_hdmi_connector(x) \
 	container_of(x, struct sti_hdmi_connector, drm_connector)
 
+static const struct drm_prop_enum_list colorspace_mode_names[] = {
+	{ HDMI_COLORSPACE_RGB, "rgb" },
+	{ HDMI_COLORSPACE_YUV422, "yuv422" },
+	{ HDMI_COLORSPACE_YUV444, "yuv444" },
+};
+
 u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
 {
 	return readl(hdmi->regs + offset);

drivers/gpu/drm/sti/sti_hdmi.h

···
 	struct hdmi_audio_infoframe cea;
 };
 
-static const struct drm_prop_enum_list colorspace_mode_names[] = {
-	{ HDMI_COLORSPACE_RGB, "rgb" },
-	{ HDMI_COLORSPACE_YUV422, "yuv422" },
-	{ HDMI_COLORSPACE_YUV444, "yuv444" },
-};
-
 #define DEFAULT_COLORSPACE_MODE HDMI_COLORSPACE_RGB
 
 /**