[SPARC]: Kill __irq_itoa().

This ugly hack was long overdue to die.

It was a way to print out Sparc interrupts in a more freindly format,
since IRQ numbers were arbitrary opaque 32-bit integers which vectored
into PIL levels.  These 32-bit integers were not necessarily in the
0-->NR_IRQS range, but the PILs they vectored to were.

The idea now is that we will increase NR_IRQS a little bit and use a
virtual<-->real IRQ number mapping scheme similar to PowerPC.

That makes this IRQ printing hack irrelevant, and furthermore only a
handful of drivers actually used __irq_itoa() making it even less
useful.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/atm/fore200e.c

@@ -167,13 +167,9 @@ fore200e_atm2fore_aal(int aal)
 static char*
 fore200e_irq_itoa(int irq)
 {
-#if defined(__sparc_v9__)
-    return __irq_itoa(irq);
-#else
     static char str[8];
     sprintf(str, "%d", irq);
     return str;
-#endif
 }