[MIPS] unexport {allocate,free}_irqno

The following routines

allocate_irqno()
free_irqno()

seem not to be used outside of the core kernel code, hence
exporting these functions is pointless. This patch removes
the export.

Signed-off-by: Dmitri Vorobiev <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/kernel/irq.c

···
 	return irq;
 }
 
-EXPORT_SYMBOL_GPL(allocate_irqno);
-
 /*
  * Allocate the 16 legacy interrupts for i8259 devices.  This happens early
  * in the kernel initialization so treating allocation failure as BUG() is
···
 	clear_bit(irq, irq_map);
 	smp_mb__after_clear_bit();
 }
-
-EXPORT_SYMBOL_GPL(free_irqno);
 
 /*
  * 'what should we do if we get a hw irq event on an illegal vector'.