ARM: dts: qcom: apq8026-asus-sparrow: Enable ADSP

The customized reserved memory for ADSP is already configured, so we
just need to enable the node.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220423155059.660387-4-luca@z3ntu.xyz