Hi Greg,
For your consideration following upstream patches taken from lede source tree[1] targeted for 4.9.y.
09f3510 (ARM: BCM5301X: Add back handler ignoring external)
5d1f2d2 (ARM: dts: BCM5301X: Set 5 GHz wireless frequency limits)
0c2bf9f (ARM: dts: BCM5301X: Correct GIC_PPI interrupt flags)
6e347b5 (PCI: iproc: Save host bridge window resource in struct)
6c356ed (MIPS: Lantiq: Fix cascaded IRQ setup)
e247454 (i2c: bcm2835: Fix hang for writing messages larger than 16 bytes)
d4030d7 (i2c: bcm2835: Protect against unexpected TXW/RXR interrupts)
23c9540 (i2c: bcm2835: Use dev_dbg logging on transfer errors)
8d2cc5cc (i2c: bcm2835: Can't support I2C_M_IGNORE_NAK)
155e8b3 (clk: bcm: Support rate change propagation on bcm2835 clocks)
d86d46a (clk: bcm: Allow rate change propagation to PLLH_AUX on VEC clock)
2aab7a2 (clk: bcm: Fix 'maybe-uninitialized' warning in bcm2835_clock_choose_div_and_prate())
5548609 (clk: bcm2835: Don't rate change PLLs on behalf of DSI PLL dividers.)
8a39e9f (clk: bcm2835: Register the DSI0/DSI1 pixel clocks.)
3f91958 (clk: bcm2835: Add leaf clock measurement support, disabled by default)
2201ac6 (dmaengine: bcm2835: Fix cyclic DMA period splitting)
cd4b1e3 (usb: dwc2: Remove unnecessary kfree)
bd5d213 (mtd: bcm47xxpart: fix parsing first block after aligned TRX)
40be0dd (net: add devm version of alloc_etherdev_mqs function)
34a5102 (net: bgmac: allocate struct bgmac just once & don't copy it)
aa8863e (net: bgmac: drop struct bcma_mdio we don't need anymore)
3ec7544 (of: Add check to of_scan_flat_dt() before accessing initial_boot_params)
7272416 (rt2500usb: don't mark register accesses as inline)
f4737a6 (brcmfmac: check brcmf_bus_get_memdump result for error)
36401cb (brcmfmac: be more verbose when PSM's watchdog fires)
9587a01 (brcmfmac: merge two brcmf_err macros into one)
087fa71 (brcmfmac: switch to C function (__brcmf_err) for printing errors)
d063055 (brcmfmac: merge two remaining brcmf_err macros)
93c7018 (rt2x00usb: do not anchor rx and tx urb's)
0488a61 (rt2x00usb: fix anchor initialization)
91b6328 (brcmfmac: Use net_device_stats from struct net_device)
a083c8f (rt2x00: Fix incorrect usage of CONFIG_RT2X00_LIB_USB)
6232c17 (rt2x00: avoid introducing a USB dependency in the rt2x00lib module)
Cherry-picked and build tested on Linux 4.9.20 for ARCH=arm/arm64/i386/x86_64 + allmodconfig.
Regards, Amit Pundir
[1] https://github.com/lede-project/source. These patches are mostly cherry-picked from target/linux/*/patches-4.9 directories. Though some are also put in package/kernel/*/patches/ directory.