time64.inc: Add GLIBC_64BIT_TIME_FLAGS on ppc/x86 as well

Make mips expression across all 32bit mips architectures

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>