USB: serial: metro-usb: remove function prototypes
USB: serial: metro-usb: remove function prototypes

By rearranging the functions a bit, we can remove all function
prototypes.

Note, this also deleted the _close function, as it wasn't needed, it was
doing the same thing the cleanup function did, so just call that
instead.

Cc: Aleksey Babahin <d5adf8a94a347370ac103722936d2e5cec484875@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs