[SPARC]: Remove SunOS and Solaris binary support.

Documentation/feature-removal-schedule.txt

Documentation/highuid.txt

Documentation/magic-number.txt

arch/sparc/Kconfig

arch/sparc/defconfig

arch/sparc/kernel/Makefile

arch/sparc/kernel/entry.S

arch/sparc/kernel/errtbls.c

arch/sparc/kernel/head.S

arch/sparc/kernel/sclow.S

arch/sparc/kernel/signal.c

arch/sparc/kernel/sparc_ksyms.c

arch/sparc/kernel/sunos_asm.S

arch/sparc/kernel/sunos_ioctl.c

arch/sparc/kernel/sys_solaris.c

arch/sparc/kernel/sys_sunos.c

arch/sparc/kernel/systbls.S

arch/sparc64/Kconfig

arch/sparc64/Makefile

arch/sparc64/defconfig