dmaengine: qcom: gpi: remove unused struct 'reg_info'

'reg_info' was never used since it's initial
commit 5d0c3533 ("dmaengine: qcom: Add GPI dma driver")
Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240517234024.231477-1-linux@treblig.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>