Pull up following revision(s) (requested by joerg in ticket #289):
	external/gpl3/binutils/dist/gas/config/tc-arm.c: revision 1.7
Avoid undefined behaviour (merged from upstream commit
d840c081f8082e8b9e63fead5306643975a97bb3).
Ticket #289
Pull up following revision(s) (requested by chs in ticket #290):
	sys/external/bsd/drm2/radeon/radeondrmkmsfb.c: revision 1.4
apply several changes from intelfb.c revs 1.7 through 1.9:
 - provide a setmode callback for genfb
 - add a pmf shutdown handler to switch genfb into polling mode
 - no need to call drm_fb_helper_set_config after genfb attaches,
   as the setmode callback is called by genfb_attach
Pull up following revision(s) (requested by chs in ticket #291):
	sys/arch/ofppc/ofppc/locore.S: revision 1.49
	sys/arch/macppc/macppc/locore.S: revision 1.72
in the initial asm code, save the interesting caller-saved registers
(containing "arg" and "len") across function calls to C code.
fixes kernels built with gcc 4.8.
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