kernel: bump 4.9 to 4.9.155

Refreshed all patches.

Remove upstreamed:
- 100-arm-cns3xxx-fix-writing-to-wrong-PCI-registers-after.patch

Altered patches:
- 721-phy_packets.patch

Compile-tested on: ar7
Runtime-tested on: none

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/generic/backport-4.9/090-net-generalize-napi_complete_done.patch

@@ -657,7 +657,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		gfar_write(&regs->rstat, gfargrp->rstat);
 --- a/drivers/net/ethernet/freescale/ucc_geth.c
 +++ b/drivers/net/ethernet/freescale/ucc_geth.c
-@@ -3301,7 +3301,7 @@ static int ucc_geth_poll(struct napi_str
+@@ -3303,7 +3303,7 @@ static int ucc_geth_poll(struct napi_str
  		howmany += ucc_geth_rx(ugeth, i, budget - howmany);
  
  	if (howmany < budget) {