* config.gcc (mips*-*-netbsd*): Set target_cpu_default to
"MASK_GAS|MASK_ABICALLS".
* config/mips/netbsd.h (TARGET_ENDIAN_DEFAULT)
(TARGET_DEFAULT): Remove.
(MACHINE_TYPE): Undefine before defining.
(DBX_DEBUGGING_INFO, PREFERRED_DEBUGGING_TYPE): Remove.

From-SVN: r56627