[media] cx25821-medusa-defines.h: Fix typo

Fix typo in comment in word 'decoder'.
Signed-off-by: NLeonid V. Fedorenchik <leonidsbox@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx25821/cx25821-medusa-defines.h

@@ -23,7 +23,7 @@
 #ifndef _MEDUSA_DEF_H_
 #define _MEDUSA_DEF_H_
 
-/* Video deocder that we supported */
+/* Video decoder that we supported */
 #define VDEC_A		0
 #define VDEC_B		1
 #define VDEC_C		2