vsprintf: avoid nested switch statement on same variable

vsprintf: avoid nested switch statement on same variable

Now that we have simplified the number format types, the top-level
switch table can easily just handle all the remaining cases, and we
don't need to have a case statement with a conditional on the same
expression as the switch statement.

We do want to fall through to the common 'number()' case, but that's
trivially done by making the other case statements use 'continue'
instead of 'break'.  They are just looping back to the top, after all.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>