Adding TARGET_CPU_VARIANT to config file.

Bug: 8005082

Merge from internal master.

Change-Id: I33210d3044119fbeb1ce00a515a2f32d6893ad14
Remove unneeded ARCH_ARM_USE_NON_NEON_MEMCPY value.

Bug: 8005082

Merge change from internal master.

(cherry-picked from e0f6895de8ca1c92f97f3ac2d4529e5265960025)

Change-Id: Ieaf6fa402277ebe2282e20dcfdc649df0fb92f95
Remove unused asus/grouper ARCH_ARM_HAVE_TLS_REGISTER.

Change-Id: I5165185b7fb36a78a734402c639857f4b7a81ef1