drm/uapi: Move drm_color_ctm_3x4 out from drm_mode.h

drm_color_ctm_3x4 is some undocumented amgdpu private
uapi and thus has no business being in drm_mode.h.
At least move it to some amdgpu specific header, albeit
with the wrong namespace as maybe something somewhere
is using this already?

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Joshua Ashton <joshua@froggi.es>
Cc: Alex Deucher <alexander.deucher@amd.com>
Fixes: 6872a189 ("drm/amd/display: Add 3x4 CTM support for plane CTM")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240422085857.17651-1-ville.syrjala@linux.intel.comReviewed-by: Harry Wentland <harry.wentland@amd.com>

include/uapi/drm/amdgpu_drm.h

@@ -1269,6 +1269,15 @@ struct drm_amdgpu_info_gpuvm_fault {
 #define AMDGPU_FAMILY_GC_10_3_7			151 /* GC 10.3.7 */
 #define AMDGPU_FAMILY_GC_11_5_0			150 /* GC 11.5.0 */
 
+/* FIXME wrong namespace! */
+struct drm_color_ctm_3x4 {
+	/*
+	 * Conversion matrix with 3x4 dimensions in S31.32 sign-magnitude
+	 * (not two's complement!) format.
+	 */
+	__u64 matrix[12];
+};
+
 #if defined(__cplusplus)
 }
 #endif

include/uapi/drm/drm_mode.h

@@ -846,14 +846,6 @@ struct drm_color_ctm {
 	__u64 matrix[9];
 };
 
-struct drm_color_ctm_3x4 {
-	/*
-	 * Conversion matrix with 3x4 dimensions in S31.32 sign-magnitude
-	 * (not two's complement!) format.
-	 */
-	__u64 matrix[12];
-};
-
 struct drm_color_lut {
 	/*
 	 * Values are mapped linearly to 0.0 - 1.0 range, with 0x0 == 0.0 and