Fix compilation when DEBUG option is enabled.

- remove unused code in mips/rmi/xlr_pci.c
- remove unused variable in mips/rmi/dev/nlge/if_nlge.c
- fix reference to old function in mips/mips/pmap.c

Reported by:	Prabhath Raman (prabhath at netlogicmicro com)

sys/mips/mips/pmap.c

@@ -3098,7 +3098,7 @@ pads(pmap_t pm)
 				    va >= VM_MAXUSER_ADDRESS)
 					continue;
 				ptep = pmap_pte(pm, va);
-				if (pmap_pte_v(ptep))
+				if (pte_test(ptep, PTE_V))
 					printf("%x:%x ", va, *(int *)ptep);
 			}
 

sys/mips/rmi/dev/nlge/if_nlge.c

@@ -213,7 +213,6 @@ static int	send_fmn_msg_tx(struct nlge_softc *, struct msgrng_msg *,
 //#define DEBUG
 #ifdef DEBUG
 static int	mac_debug = 1;
-static int 	reg_dump = 0;
 #undef PDEBUG
 #define PDEBUG(fmt, args...) \
         do {\

sys/mips/rmi/xlr_pci.c

@@ -105,13 +105,6 @@ __FBSDID("$FreeBSD$");
         (MSI_MIPS_DATA_TRGRLVL | MSI_MIPS_DATA_DELFIXED |	       \
 	 MSI_MIPS_DATA_ASSERT | (irq))
 
-#define DEBUG
-#ifdef DEBUG
-#define dbg_devprintf	device_printf
-#else
-#define dbg_devprintf(dev, fmt, ...)
-#endif
-
 struct xlr_pcib_softc {
 	bus_dma_tag_t	sc_pci_dmat;	/* PCI DMA tag pointer */
 };