[MIPS] Lasat: bring back from the dead

After the common MIPS CPU interrupt controller (for irq0-7) was introduced
the Lasat boards didn't get their interrupts right, so nothing worked. The
old routines need to be offset by the new 8 hardware interrupts common to
all MIPS CPU's.

Signed-off-by: Thomas Horsten <thomas@horsten.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lasat/interrupt.c

@@ -34,11 +34,13 @@ static volatile int lasat_int_mask_shift;
 
 void disable_lasat_irq(unsigned int irq_nr)
 {
+	irq_nr -= LASAT_IRQ_BASE;
 	*lasat_int_mask &= ~(1 << irq_nr) << lasat_int_mask_shift;
 }
 
 void enable_lasat_irq(unsigned int irq_nr)
 {
+	irq_nr -= LASAT_IRQ_BASE;
 	*lasat_int_mask |= (1 << irq_nr) << lasat_int_mask_shift;
 }