Current modules must use armv7_a_neon to specify source files that
compile only with neon. If a future arch variant also supports neon,
all these modules will fall back to non-neon. Support a neon arch
feature that modules can use instead. Similarly, support dspr2 for
mips.
arm_device.go was also mixing armv7-a-neon with armv7_a_neon. Use
armv7-a-neon consistently, and fix the - to _ when creating the
property structs.
Test: m -j checkbuild
Change-Id: I24d3764280ab3bcbb9a73c0934edc9b99fc7f6a0
0906f17f7e