dt-bindings: Update Guru Das Srinagesh's email address

Clean up my email address as the codeaurora.org address is not used
anymore.

Signed-off-by: Guru Das Srinagesh <quic_gurus@quicinc.com>
Link: https://lore.kernel.org/r/20230728001622.4938-1-quic_gurus@quicinc.com


Signed-off-by: Rob Herring <robh@kernel.org>