First coarse run to fix coding style in locm3.

Added --terse and --mailback options to the make stylecheck target. It
also does continue even if it enounters a possible error.

We decided on two exceptions from the linux kernel coding standard:
- Empty wait while loops may end with ; on the same line.
- All blocks after while, if, for have to be in brackets even if they
  only contain one statement. Otherwise it is easy to introduce an
  error.

Checkpatch needs to be adapted to reflect those changes.

lib/stm32/f1/flash.c

@@ -95,7 +95,10 @@ void flash_clear_status_flags(void)
 
 u32 flash_get_status_flags(void)
 {
-	return (FLASH_SR &= (FLASH_SR_PGERR | FLASH_SR_EOP | FLASH_SR_WRPRTERR | FLASH_SR_BSY));
+	return FLASH_SR &= (FLASH_SR_PGERR |
+			FLASH_SR_EOP |
+			FLASH_SR_WRPRTERR |
+			FLASH_SR_BSY);
 }
 
 void flash_unlock_option_bytes(void)
@@ -174,8 +177,9 @@ void flash_erase_option_bytes(void)
 {
 	flash_wait_for_last_operation();
 
-	if ((FLASH_CR & FLASH_CR_OPTWRE) == 0)
+	if ((FLASH_CR & FLASH_CR_OPTWRE) == 0) {
 		flash_unlock_option_bytes();
+	}
 
 	FLASH_CR |= FLASH_CR_OPTER;	/* Enable option byte erase. */
 	FLASH_CR |= FLASH_CR_STRT;
@@ -187,8 +191,9 @@ void flash_program_option_bytes(u32 address, u16 data)
 {
 	flash_wait_for_last_operation();
 
-	if ((FLASH_CR & FLASH_CR_OPTWRE) == 0)
+	if ((FLASH_CR & FLASH_CR_OPTWRE) == 0) {
 		flash_unlock_option_bytes();
+	}
 
 	FLASH_CR |= FLASH_CR_OPTPG;	/* Enable option byte programming. */
 	(*(volatile u16 *)address) = data;