[][kernel][common][eth][Correct ring buffer allocation for the LRO]

[Description]
Refactor ring buffer allocation for the LRO.

This patch is backported from Linux-5.15.

Without this patch, the driver might not be requesting the appropriate
data buffer for the LRO ring.

[Release-log]
N/A


Change-Id: Ifffbc183cafbd694e92d492623bf26e770b7c77e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8505240
1 file changed