arm: fix prototypes

armsrc/flashmem.c

@@ -25,7 +25,7 @@ void FlashmemSetSpiBaudrate(uint32_t baudrate) {
 }
 
 // initialize
-bool FlashInit() {
+bool FlashInit(void) {
     FlashSetup(FLASHMEM_SPIBAUDRATE);
 
     StartTicks();
@@ -435,7 +435,7 @@ bool Flash_WipeMemoryPage(uint8_t page) {
     return true;
 }
 // Wipes flash memory completely, fills with 0xFF
-bool Flash_WipeMemory() {
+bool Flash_WipeMemory(void) {
     if (!FlashInit()) {
         if (DBGLEVEL > 3) Dbprintf("Flash_WriteData init fail");
         return false;
@@ -462,7 +462,7 @@ bool Flash_WipeMemory() {
 }
 
 // enable the flash write
-void Flash_WriteEnable() {
+void Flash_WriteEnable(void) {
     FlashSendLastByte(WRITEENABLE);
     if (DBGLEVEL > 3) Dbprintf("Flash Write enabled");
 }