Change FIOC_MMAP into file operation call

- Add mmap into file_operations and remove it from ioctl definitions.
- Add mm_map structure definitions to support future unmapping
- Modify all drivers to initialize the operations struct accordingly

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

boards/arm/sam34/sam4l-xplained/src/sam_slcd.c

@@ -297,6 +297,7 @@ static const struct file_operations g_slcdops =
   NULL,          /* seek */
   slcd_ioctl,    /* ioctl */
   NULL,          /* truncate */
+  NULL,          /* mmap */
   slcd_poll      /* poll */
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
   , NULL         /* unlink */

boards/arm/stm32/mikroe-stm32f4/src/stm32_touchscreen.c

@@ -269,6 +269,7 @@ static const struct file_operations tc_fops =
   NULL,       /* seek */
   tc_ioctl,   /* ioctl */
   NULL,       /* truncate */
+  NULL,       /* mmap */
   tc_poll     /* poll */
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
   , NULL      /* unlink */

boards/arm/stm32/stm32ldiscovery/src/stm32_lcd.c

@@ -347,6 +347,7 @@ static const struct file_operations g_slcdops =
   NULL,          /* seek */
   slcd_ioctl,    /* ioctl */
   NULL,          /* truncate */
+  NULL,          /* mmap */
   slcd_poll      /* poll */
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
   , NULL         /* unlink */