m68k/irq: Rename {,__}m68k_handle_int()

- Rename m68k_handle_int() to generic_handle_irq(), and drop the unneeded
    asmlinkage,
  - Rename __m68k_handle_int() to do_IRQ().

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/apollo/dn_ints.c

@@ -6,7 +6,7 @@
 
 void dn_process_int(unsigned int irq, struct pt_regs *fp)
 {
-	__m68k_handle_int(irq, fp);
+	do_IRQ(irq, fp);
 
 	*(volatile unsigned char *)(pica)=0x20;
 	*(volatile unsigned char *)(picb)=0x20;