linux-imx

sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE

note that while struct compat_sigaction is the generic one, syscall
itself *isn't* - different arguments.  IOW, CONFIG_ODD_RT_SIGACTION
stays.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>