[FL-2520] FW build with -Wextra (#1185)

* Fixing compiler warnings with -Wextra
* More warnings suppression, WIP
* Even more warning fixes
* Added new lines at end of text files.
* Padding fix
* Additional fixes to warnings on different build configurations; added -Wextra to default build pipeline
* Fixes for Secplus v1
* -additional warnings
* +-Wredundant-decls fixes
* FuriHal: print stack overflow task name in console
* FuriHal: add missing include

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

lib/u8g2/u8g2_glue.c

@@ -3,6 +3,8 @@
 #include <furi_hal.h>
 
 uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
+    UNUSED(u8x8);
+    UNUSED(arg_ptr);
     switch(msg) {
     case U8X8_MSG_GPIO_AND_DELAY_INIT:
         /* HAL initialization contains all what we need so we can skip this part. */
@@ -27,6 +29,7 @@ uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, vo
 }
 
 uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr) {
+    UNUSED(u8x8);
     switch(msg) {
     case U8X8_MSG_BYTE_SEND:
         furi_hal_spi_bus_tx(&furi_hal_spi_bus_handle_display, (uint8_t*)arg_ptr, arg_int, 10000);

lib/u8g2/u8x8_display.c

@@ -147,4 +147,4 @@ void u8x8_ClearLine(u8x8_t* u8x8, uint8_t line) {
         u8x8->display_cb(
             u8x8, U8X8_MSG_DISPLAY_DRAW_TILE, u8x8->display_info->tile_width, (void*)&tile);
     }
-}
+}

lib/u8g2/u8x8_gpio.c

@@ -44,4 +44,4 @@ void u8x8_gpio_Delay(u8x8_t *u8x8, uint8_t msg, uint8_t dly)
 {
   u8x8->gpio_and_delay_cb(u8x8, msg, dly, NULL);
 }
-*/
+*/