The Octeontx2 MAC block (CGX) has separate data paths (SMU and GMP) for
different speeds, allowing for efficient data transfer.

The previous patch which added pause frame configuration has a bug due
to which pause frame feature is not working in GMP mode.

This patch fixes the issue by configurating appropriate registers.

Fixes: f7e086e7 ("octeontx2-af: Pause frame configuration at cgx")
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240326052720.4441-1-hkelam@marvell.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>