msm: gsi: Read 64-bit ring RP value from registers

The DMA address allocated may be in 64-bit address
range if dma mask is set to 64-bit, the MSB register
value is required.

Signed-off-by: Cheng Zeng <quic_chenzeng@quicinc.com>

Change-Id: Ie091b01ac44e70d450a8d050855b5f3f0f510695
1 file changed