net/mlx5: Enable 4K UAR only when page size is bigger than 4K

net/mlx5: Enable 4K UAR only when page size is bigger than 4K

[ Upstream commit 91828bd89940e8145f91751a015bc11bc486aad0 ]

When the page size isn't bigger than 4K, there is no added value of enabling 4K
UAR feature in the Firmware.

Modified the condition of enabling the 4K UAR accordingly.

Fixes: f502d834950a ("net/mlx5: Activate support for 4K UARs")
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>