drm/displayid: rename displayid_hdr to displayid_header

Avoid any confusion with High Dynamic Range. No functional changes.

Reviewed-by: Ville Syrjälä <[e-mail]>
Signed-off-by: Jani Nikula <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/ce0[e-mail]

drivers/gpu/drm/drm_displayid.c

···
 {
 	int i, dispid_length;
 	u8 csum = 0;
-	const struct displayid_hdr *base;
+	const struct displayid_header *base;
 
-	base = (const struct displayid_hdr *)&displayid[idx];
+	base = (const struct displayid_header *)&displayid[idx];
 
 	DRM_DEBUG_KMS("base revision 0x%x, length %d, %d %d\n",
 		      base->rev, base->bytes, base->prod_id, base->ext_count);
···
 					      int *ext_index)
 {
 	const u8 *displayid = drm_find_edid_extension(edid, DISPLAYID_EXT, ext_index);
-	const struct displayid_hdr *base;
+	const struct displayid_header *base;
 	int ret;
 
 	if (!displayid)
···
 	if (ret)
 		return NULL;
 
-	base = (const struct displayid_hdr *)&displayid[*idx];
+	base = (const struct displayid_header *)&displayid[*idx];
 	*length = *idx + sizeof(*base) + base->bytes;
 
 	return displayid;
···
 			return NULL;
 		}
 
-		iter->idx += sizeof(struct displayid_hdr);
+		iter->idx += sizeof(struct displayid_header);
 
 		block = displayid_iter_block(iter);
 		if (block)

include/drm/drm_displayid.h

···
 #define PRODUCT_TYPE_REPEATER 5
 #define PRODUCT_TYPE_DIRECT_DRIVE 6
 
-struct displayid_hdr {
+struct displayid_header {
 	u8 rev;
 	u8 bytes;
 	u8 prod_id;