x86/signal: Deinline get_sigframe, save 240 bytes

This function compiles to 277 bytes of machine code and has 4 callsites.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Link: http://lkml.kernel.org/r/1443443037-22077-4-git-send-email-dvlasenk@redhat.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>