PowerPC: merge commonly-defined flags

PLATFORM_RELFLAGS += -meabi
PLATFORM_CPPFLAGS += -ffixed-r2
were defined in all arch/powerpc/${CPU}/config.mk.

This commit moves them to arch/powerpc/config.mk.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
12 files changed