[media] c8sectpfe: fix pinctrl dependencies

compiling on some archs fail with:

drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c:540:8: error: implicit declaration of function ‘pinctrl_select_state’ [-Werror=implicit-function-declaration]
  ret = pinctrl_select_state(fei->pinctrl, tsin->pstate);

That's due the need of including pinctrl.h header and because
CONFIG_PINCTRL needs to be true.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/sti/c8sectpfe/Kconfig

 config DVB_C8SECTPFE
 	tristate "STMicroelectronics C8SECTPFE DVB support"
-	depends on DVB_CORE && I2C && (ARCH_STI || ARCH_MULTIPLATFORM || COMPILE_TEST)
+	depends on PINCTRL && DVB_CORE && I2C
+	depends on ARCH_STI || ARCH_MULTIPLATFORM || COMPILE_TEST
 	select LIBELF_32
 	select FW_LOADER
 	select FW_LOADER_USER_HELPER_FALLBACK

drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c

@@ -33,6 +33,7 @@
 #include <linux/time.h>
 #include <linux/version.h>
 #include <linux/wait.h>
+#include <linux/pinctrl/pinctrl.h>
 
 #include "c8sectpfe-core.h"
 #include "c8sectpfe-common.h"