flash: Rename init_flash_dev to flash_dev_init

Change-Id: I6b9a916053baf09c34100dcb5262a4b66a44bc80
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/vpnor/flash.cpp b/vpnor/flash.cpp
index 2d58463..b5a2122 100644
--- a/vpnor/flash.cpp
+++ b/vpnor/flash.cpp
@@ -42,7 +42,7 @@
 };
 using StringPtr = std::unique_ptr<char, StringDeleter>;
 
-int init_flash_dev(struct mbox_context* context)
+int flash_dev_init(struct mbox_context* context)
 {
     StringPtr filename(get_dev_mtd());
     int fd = 0;