poly1305: make --disable-asm work on x86, aarch64 and ppc
* cipher/poly1305.c [__aarch64__] (ADD_1305_64): Check for HAVE_CPU_ARCH_ARM. [__x86_64__] (ADD_1305_64): Check for HAVE_CPU_ARCH_X86. [__powerpc__] (ADD_1305_64): Check for HAVE_CPU_ARCH_PPC. [__i386__] (ADD_1305_32): Check for HAVE_CPU_ARCH_X86.
- Reported-by: Horst Wente <horst.wente@posteo.de>
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>