sparc64: Make structure match kernel uapi
sparc64: Make structure match kernel uapi

Update from linux/arch/sparc/include/uapi/asm/uctx.h

wbx-github/uclibc-ng,kraj/uclibc-ng,kraj/uclibc-ng,wbx-github/uclibc-ng,wbx-github/uclibc-ng,wbx-github/uclibc-ng,kraj/uclibc-ng,kraj/uclibc-ng