V4L/DVB (6685): ir-keymaps.c: extra keys on winfast Y04G0033 remote

This change adds support for 4 extra keys on the remote currently being
shipped by leadtek with their "WinFast TV2000 XP/Expert" and
"WinFast PVR2000" cards. The remote P/N seems to be Y04G0033 and
you can see a picture of it here: http://lespinasse.org/y04g0033.jpg

The extra keys are at the bottom and are labeled MCE +VOL, -VOL, +CH, -CH.
I chose to map them to the F21-F24 keycodes, following the precedent of
ir_codes_gotview7135[], so as to differentiate these 'MCE' keys from the
other +VOL, -VOL, +CH, -CH 'arrow' keys higher up on the remote.
Signed-off-by: Michel Lespinasse <walken@zoy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/common/ir-keymaps.c

@@ -1331,7 +1331,12 @@ IR_KEYTAB_TYPE ir_codes_winfast[IR_KEYTAB_SIZE] = {
 	[ 0x35 ] = KEY_FASTFORWARD,
 	[ 0x36 ] = KEY_TV,
 	[ 0x37 ] = KEY_RADIO,         /* FM */
-	[ 0x38 ] = KEY_DVD
+	[ 0x38 ] = KEY_DVD,
+
+	[ 0x3e ] = KEY_F21,           /* MCE +VOL, on Y04G0033 */
+	[ 0x3a ] = KEY_F22,           /* MCE -VOL, on Y04G0033 */
+	[ 0x3b ] = KEY_F23,           /* MCE +CH,  on Y04G0033 */
+	[ 0x3f ] = KEY_F24            /* MCE -CH,  on Y04G0033 */
 };
 
 EXPORT_SYMBOL_GPL(ir_codes_winfast);