fix comments

Author: jpbland1

src/libwolfboot.c

@@ -268,7 +268,7 @@ static int RAMFUNCTION nvm_select_fresh_sector(int part)
         }
     }
 finish:
-    /* Erase the non-selected partition */
+    /* Erase the non-selected partition, requires unlocked flash */
     addrErase -= WOLFBOOT_SECTOR_SIZE * (!sel);
     if (*((uint32_t*)(addrErase + WOLFBOOT_SECTOR_SIZE - sizeof(uint32_t)))
             != FLASH_WORD_ERASED) {

src/update_flash.c

@@ -947,7 +947,8 @@ void RAMFUNCTION wolfBoot_start(void)
 #endif
 
 #ifdef NVM_FLASH_WRITEONCE 
-    /* nvm_select_fresh_sector needs unlocked flash in cases where  */
+    /* nvm_select_fresh_sector needs unlocked flash in cases where the unused
+     * sector needs to be erased */
     hal_flash_unlock();
 #ifdef EXT_FLASH
     ext_flash_unlock();
@@ -958,7 +959,6 @@ void RAMFUNCTION wolfBoot_start(void)
     updateRet = wolfBoot_get_partition_state(PART_UPDATE, &updateState);
 
 #ifdef NVM_FLASH_WRITEONCE 
-    /* nvm_select_fresh_sector needs unlocked flash in cases where  */
     hal_flash_lock();
 #ifdef EXT_FLASH
     ext_flash_lock();