* sysdeps/powerpc/powerpc64/sysdep.h [__ASSEMBLER__]: Include
<sysdeps/powerpc/sysdep.h> independent of __ASSEMBLER__.
[PIC]: Redundent for powerpc64, removed.
(ENTRY): Generate size and alignment for opd entry.
(EALIGN): Generate size and alignment for opd entry.
(END): Use DOT_LABEL in ASM_SIZE_DIRECTIVE.
(END_GEN_TB): Use DOT_LABEL in ASM_SIZE_DIRECTIVE.