[patch] serial: stm32: fix a type issue

[Dan Carpenter]

On Wed, Oct 12, 2016 at 09:52:39AM +0100, Russell King - ARM Linux wrote:
> On Wed, Oct 12, 2016 at 09:21:03AM +0300, Dan Carpenter wrote:
> > We store UNDEF_REG in a u8.  It causes a problem in functions like
> > stm32_tx_dma_complete() where we check "if (ofs->icr == UNDEF_REG)".
> > 
> > Fixes: 3489187204eb ('serial: stm32: adding dma support')
> 
> Correct form is:
> 
> Fixes: 12-digit-hash ("summary line")

When I originally created the Fixes tag format, I used single quotes.
I don't remember why though and I can change with the times.  :)

regards,
dan carpenter