media: dvb: add missing DVB-S2X FEC parameter values

This commit is adding the missing short FEC
Missed on commit 6508a50fe84f9858e8b59b53dce3847aaeeab744

More info: https://dvb.org/wp-content/uploads/2021/02/A083-2r2_DVB-S2X_Draft-EN-302-307-2-v131_Feb_2021.pdf
Table 1: S2X System configurations and application areas

Please note that 128APSK, 256APSK and 256APSK-L
and FEC 29/45, 31/45 are still missing from enums.

Link: https://lore.kernel.org/linux-media/[e-mail]
Cc: Robert Schlabbach <[e-mail]>
Cc: Tom Richardson <[e-mail]>
Signed-off-by: Athanasios Oikonomou <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

include/uapi/linux/dvb/frontend.h

···
  * @FEC_28_45: Forward Error Correction Code 28/45
  * @FEC_32_45: Forward Error Correction Code 32/45
  * @FEC_77_90: Forward Error Correction Code 77/90
+ * @FEC_11_45: Forward Error Correction Code 11/45
+ * @FEC_4_15: Forward Error Correction Code 4/15
+ * @FEC_14_45: Forward Error Correction Code 14/45
+ * @FEC_7_15: Forward Error Correction Code 7/15
  *
  * Please note that not all FEC types are supported by a given standard.
  */
···
 	FEC_28_45,
 	FEC_32_45,
 	FEC_77_90,
+	FEC_11_45,
+	FEC_4_15,
+	FEC_14_45,
+	FEC_7_15,
 };
 
 /**