[PATCH] hvc_console: Use hvc_get_chars in hvsi code

Now that hvc_get_chars doesn't strip NULs, hvsi doesn't have to duplicate it.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>