media: allegro-dvt/nal-h264.h: fix kernel-doc: hdr -> hrd

Give typo in kernel-doc documentation: hdr -> hrd

Fixes this warning:

drivers/media/platform/allegro-dvt/nal-h264.h:33: warning: expecting prototype for struct nal_h264_hdr_parameters. Prototype was for struct
nal_h264_hrd_parameters instead
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/allegro-dvt/nal-h264.h

@@ -12,7 +12,7 @@
 #include <linux/types.h>
 
 /**
- * struct nal_h264_hdr_parameters - HDR parameters
+ * struct nal_h264_hrd_parameters - HRD parameters
  *
  * C struct representation of the sequence parameter set NAL unit as defined by
  * Rec. ITU-T H.264 (04/2017) E.1.2 HRD parameters syntax.