drm/fourcc: fix AMD modifiers PACKERS field doc

This field doesn't alias with BANK_XOR_BITS: PACKERS is bits 27:29 while
BANK_XOR_BITS is bits 24:26.

Fixes: 8ba16d59 ("drm/fourcc: Add AMD DRM modifiers.")
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

include/uapi/drm/drm_fourcc.h

@@ -1215,7 +1215,7 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier)
 #define AMD_FMT_MOD_PIPE_XOR_BITS_MASK 0x7
 #define AMD_FMT_MOD_BANK_XOR_BITS_SHIFT 24
 #define AMD_FMT_MOD_BANK_XOR_BITS_MASK 0x7
-#define AMD_FMT_MOD_PACKERS_SHIFT 27 /* aliases with BANK_XOR_BITS */
+#define AMD_FMT_MOD_PACKERS_SHIFT 27
 #define AMD_FMT_MOD_PACKERS_MASK 0x7
 #define AMD_FMT_MOD_RB_SHIFT 30
 #define AMD_FMT_MOD_RB_MASK 0x7