media: hantro: fix kernel-doc warnings and style

Add a description for enum values in hantro_enc_fmt,
in order to fix these warnings:

drivers/staging/media/hantro/hantro_hw.h:149: warning: Enum value 'RK3288_VPU_ENC_FMT_YUV420P' not described in enum 'hantro_enc_fmt'
drivers/staging/media/hantro/hantro_hw.h:149: warning: Enum value 'RK3288_VPU_ENC_FMT_YUV420SP' not described in enum 'hantro_enc_fmt'
drivers/staging/media/hantro/hantro_hw.h:149: warning: Enum value 'RK3288_VPU_ENC_FMT_YUYV422' not described in enum 'hantro_enc_fmt'
drivers/staging/media/hantro/hantro_hw.h:149: warning: Enum value 'RK3288_VPU_ENC_FMT_UYVY422' not described in enum 'hantro_enc_fmt'

While here, improve the kernel-doc style, adding an empty
line before the fields of the structs.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/hantro/hantro_hw.h

@@ -27,6 +27,7 @@ struct hantro_variant;
 
 /**
  * struct hantro_aux_buf - auxiliary DMA buffer for hardware data
+ *
  * @cpu:	CPU pointer to the buffer.
  * @dma:	DMA address of the buffer.
  * @size:	Size of the buffer.
@@ -41,6 +42,7 @@ struct hantro_aux_buf {
 
 /**
  * struct hantro_jpeg_enc_hw_ctx
+ *
  * @bounce_buffer:	Bounce buffer
  */
 struct hantro_jpeg_enc_hw_ctx {
@@ -52,6 +54,7 @@ struct hantro_jpeg_enc_hw_ctx {
 
 /**
  * struct hantro_h264_dec_ctrls
+ *
  * @decode:	Decode params
  * @scaling:	Scaling info
  * @sps:	SPS info
@@ -66,6 +69,7 @@ struct hantro_h264_dec_ctrls {
 
 /**
  * struct hantro_h264_dec_reflists
+ *
  * @p:		P reflist
  * @b0:		B0 reflist
  * @b1:		B1 reflist
@@ -78,6 +82,7 @@ struct hantro_h264_dec_reflists {
 
 /**
  * struct hantro_h264_dec_hw_ctx
+ *
  * @priv:	Private auxiliary buffer for hardware.
  * @dpb:	DPB
  * @reflists:	P/B0/B1 reflists
@@ -92,6 +97,7 @@ struct hantro_h264_dec_hw_ctx {
 
 /**
  * struct hantro_mpeg2_dec_hw_ctx
+ *
  * @qtable:		Quantization table
  */
 struct hantro_mpeg2_dec_hw_ctx {
@@ -100,6 +106,7 @@ struct hantro_mpeg2_dec_hw_ctx {
 
 /**
  * struct hantro_vp8_dec_hw_ctx
+ *
  * @segment_map:	Segment map buffer.
  * @prob_tbl:		Probability table buffer.
  */
@@ -140,6 +147,11 @@ struct hantro_codec_ops {
 
 /**
  * enum hantro_enc_fmt - source format ID for hardware registers.
+ *
+ * @RK3288_VPU_ENC_FMT_YUV420P: Y/CbCr 4:2:0 planar format
+ * @RK3288_VPU_ENC_FMT_YUV420SP: Y/CbCr 4:2:0 semi-planar format
+ * @RK3288_VPU_ENC_FMT_YUYV422: YUV 4:2:2 packed format (YUYV)
+ * @RK3288_VPU_ENC_FMT_UYVY422: YUV 4:2:2 packed format (UYVY)
  */
 enum hantro_enc_fmt {
 	RK3288_VPU_ENC_FMT_YUV420P = 0,