mvebu: fill additional info for mvneta tx queue workaround patch

Because some still unresolved bugs in this driver, which sprout
occasional questions what this patch works around, point to the issue
which started this. Being here, fill headers required by git am.

Signed-off-by: Tomasz Maciej Nowak <[email protected]>

target/linux/mvebu/patches-6.1/700-mvneta-tx-queue-workaround.patch

@@ -1,3 +1,6 @@
+From: Felix Fietkau <[email protected]>
+Subject: mvneta: tx queue workaround
+
 The hardware queue scheduling is apparently configured with fixed
 priorities, which creates a nasty fairness issue where traffic from one
 CPU can starve traffic from all other CPUs.
@@ -5,6 +8,8 @@ CPU can starve traffic from all other CPUs.
 Work around this issue by forcing all tx packets to go through one CPU,
 until this issue is fixed properly.
 
+Ref: https://github.com/openwrt/openwrt/issues/5411
+
 Signed-off-by: Felix Fietkau <[email protected]>
 ---
 --- a/drivers/net/ethernet/marvell/mvneta.c