virtio_console: eliminate anonymous module_init & module_exit

In the Linux kernel, the following vulnerability has been resolved:

virtio_console: eliminate anonymous module_init & module_exit

Eliminate anonymous module_init() and module_exit(), which can lead to

confusion or ambiguity when reading System.map, crashes/oops/bugs,

or an initcall_debug log.

Give each of these init and exit functions unique driver-specific

names to eliminate the anonymous names.

Example 1: (System.map)

ffffffff832fc78c t init

ffffffff832fc79e t init

ffffffff832fc8f8 t init

Example 2: (initcall_debug log)

calling init+0x0/0x12 @ 1

initcall init+0x0/0x12 returned 0 after 15 usecs

calling init+0x0/0x60 @ 1

initcall init+0x0/0x60 returned 0 after 2 usecs

calling init+0x0/0x9a @ 1

initcall init+0x0/0x9a returned 0 after 74 usecs