xcompile: Drop CC_RT_EXTRA_GCC for PPC64

It looks like some unused artifact:  The PPC64 Makefile.mk doesn't
pick it up. Also, the only other architecture using this (x86) has
linker flags there, not compiler flags.

Change-Id: I734542db9ee5b62d9a39d303d4092cd83dfef54b
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83577
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

0 files changed, 0 insertions, 0 deletions