media: davinci_vpfe: don't use kernel-doc markup for simple comments

Fix those two warnings:
   drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c:90: warning: Function parameter or member 'interface' not described in 'MODULE_PARM_DESC'
   drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c:90: warning: Function parameter or member '(default' not described in 'MODULE_PARM_DESC'
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c

@@ -77,7 +77,7 @@ static bool interface;
 module_param(interface, bool, 0444);
 module_param(debug, bool, 0644);
 
-/**
+/*
  * VPFE capture can be used for capturing video such as from TVP5146 or TVP7002
  * and for capture raw bayer data from camera sensors such as mt9p031. At this
  * point there is problem in co-existence of mt9p031 and tvp5146 due to i2c