[media] MAINTAINERS: Add c8sectpfe driver directory to STi section

Add the new c8sectpfe demux driver to the STi section of the
MAINTAINERS file.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

MAINTAINERS

@@ -1505,6 +1505,7 @@ F:	arch/arm/boot/dts/sti*
 F:	drivers/clocksource/arm_global_timer.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
+F:	drivers/media/platform/sti/c8sectpfe/
 F:	drivers/mmc/host/sdhci-st.c
 F:	drivers/phy/phy-miphy28lp.c
 F:	drivers/phy/phy-miphy365x.c