nios2: Define INTERNAL_SYSCALL_NCS, use common sycall defines
nios2: Define INTERNAL_SYSCALL_NCS, use common sycall defines

Define the nios2 version of INTERNAL_SYSCALL_NCS and remove all sycall
defines already defined by the common syscall defines.

This will make the master branch of uClibc compile again for nios2.

Signed-off-by: Tobias Klauser <9249c549618448e4c699e8032ba6c7f0d7fd4b7f@distanz.ch>
Signed-off-by: Austin Foxley <65462a1d10372f5df6b6641242ca623823c369f3@cetoncorp.com>

ddcc/klee-uclibc-0.9.33.2,m-labs/uclibc-lm32,ffainelli/uClibc,ffainelli/uClibc,ffainelli/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,m-labs/uclibc-lm32,ndmsystems/uClibc,skristiansson/uClibc-or1k,kraj/uClibc,czankel/xtensa-uclibc,atgreen/uClibc-moxie,hjl-tools/uClibc,atgreen/uClibc-moxie,atgreen/uClibc-moxie,OpenInkpot-archive/iplinux-uclibc,foss-for-synopsys-dwc-arc-processors/uClibc,mephi42/uClibc,majek/uclibc-vx32,mephi42/uClibc,kraj/uclibc-ng,kraj/uClibc,waweber/uclibc-clang,kraj/uclibc-ng,wbx-github/uclibc-ng,wbx-github/uclibc-ng,foss-xtensa/uClibc,OpenInkpot-archive/iplinux-uclibc,ddcc/klee-uclibc-0.9.33.2,ndmsystems/uClibc,ddcc/klee-uclibc-0.9.33.2,skristiansson/uClibc-or1k,wbx-github/uclibc-ng,ffainelli/uClibc,czankel/xtensa-uclibc,brgl/uclibc-ng,foss-xtensa/uClibc,hjl-tools/uClibc,ffainelli/uClibc,brgl/uclibc-ng,m-labs/uclibc-lm32,hwoarang/uClibc,wbx-github/uclibc-ng,ysat0/uClibc,groundwater/uClibc,skristiansson/uClibc-or1k,foss-xtensa/uClibc,brgl/uclibc-ng,ysat0/uClibc,atgreen/uClibc-moxie,ddcc/klee-uclibc-0.9.33.2,hwoarang/uClibc,foss-xtensa/uClibc,hjl-tools/uClibc,czankel/xtensa-uclibc,waweber/uclibc-clang,foss-for-synopsys-dwc-arc-processors/uClibc,brgl/uclibc-ng,hjl-tools/uClibc,groundwater/uClibc,hwoarang/uClibc,groundwater/uClibc,OpenInkpot-archive/iplinux-uclibc,majek/uclibc-vx32,ndmsystems/uClibc,skristiansson/uClibc-or1k,ndmsystems/uClibc,OpenInkpot-archive/iplinux-uclibc,majek/uclibc-vx32,foss-for-synopsys-dwc-arc-processors/uClibc,ysat0/uClibc,waweber/uclibc-clang,mephi42/uClibc,waweber/uclibc-clang,hjl-tools/uClibc,ysat0/uClibc,groundwater/uClibc,czankel/xtensa-uclibc,m-labs/uclibc-lm32,kraj/uclibc-ng,hwoarang/uClibc,kraj/uClibc,majek/uclibc-vx32,kraj/uclibc-ng,groundwater/uClibc,mephi42/uClibc,kraj/uClibc