mips: define cpu_has_saa in common features include
To avoid build failures such as the following on non-cavium
platforms:
| arch/mips/include/asm/atomic.h: In function 'atomic_add':
| arch/mips/include/asm/atomic.h:52:6: error: 'cpu_has_saa'
| undeclared (first use in this function)
| if (cpu_has_saa) {
| ^
We define a disabled cpu_has_saa unless the machine specific feature
overrides define a value.
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
