kernel: Bump to 4.4.22

kernel: Allo Piano DAC boards: Initial 2 channel (stereo) support
See: raspberrypi/linux#1645

kernel: Correct typos in spi-gpio35-39-overlay.dts
See: raspberrypi/linux#1651

kernel: drm/vc4: Enable limited range RGB output with CEA modes

kernel: brcmfmac: Change stop_ap sequence

boot/overlays/README

@@ -235,6 +235,26 @@ Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
                                 that does not result in clipping/distortion!)
 
 
+Name:   allo-piano-dac-pcm512x-audio
+Info:   Configures the Allo Piano DAC (2.0/2.1) audio cards.
+        (NB. This initial support is for 2.0 channel audio ONLY! ie. stereo.
+        The subwoofer outputs on the Piano 2.1 are not currently supported!)
+Load:   dtoverlay=allo-piano-dac-pcm512x-audio,<param>
+Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
+                                Digital volume control.
+                                (The default behaviour is that the Digital
+                                volume control is limited to a maximum of
+                                0dB. ie. it can attenuate but not provide
+                                gain. For most users, this will be desired
+                                as it will prevent clipping. By appending
+                                the 24db_digital_gain parameter, the Digital
+                                volume control will allow up to 24dB of
+                                gain. If this parameter is enabled, it is the
+                                responsibility of the user to ensure that
+                                the Digital volume control is set to a value
+                                that does not result in clipping/distortion!)
+
+
 Name:   at86rf233
 Info:   Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver,
         connected to spi0.0

extra/Module.symvers

@@ -530,6 +530,7 @@
 0xb0d9654a	i2c_master_recv	vmlinux	EXPORT_SYMBOL
 0x19989ae6	vfs_unlink	vmlinux	EXPORT_SYMBOL
 0x25397d89	sock_no_sendmsg	vmlinux	EXPORT_SYMBOL
+0xff86d16f	get_task_exe_file	vmlinux	EXPORT_SYMBOL
 0x8d551bef	sysctl_tcp_rmem	vmlinux	EXPORT_SYMBOL
 0xe0693413	jbd2_journal_update_sb_errno	vmlinux	EXPORT_SYMBOL
 0xb7c44a86	snd_dmaengine_pcm_open_request_chan	sound/core/snd-pcm-dmaengine	EXPORT_SYMBOL_GPL
@@ -7751,7 +7752,6 @@
 0x245e7156	drm_modeset_lock_crtc	drivers/gpu/drm/drm	EXPORT_SYMBOL
 0xa8d2ea47	crypto_sha256_update	crypto/sha256_generic	EXPORT_SYMBOL
 0x773241f9	usb_get_status	vmlinux	EXPORT_SYMBOL_GPL
-0x4e3384ef	iov_iter_fault_in_multipages_readable	vmlinux	EXPORT_SYMBOL
 0x94574eaa	dev_get_flags	vmlinux	EXPORT_SYMBOL
 0xa1269a75	__wait_on_bit_lock	vmlinux	EXPORT_SYMBOL
 0xd77c0bc8	klist_remove	vmlinux	EXPORT_SYMBOL_GPL

extra/Module7.symvers

@@ -525,6 +525,7 @@
 0xc514d721	i2c_master_recv	vmlinux	EXPORT_SYMBOL
 0x1a56e8c7	vfs_unlink	vmlinux	EXPORT_SYMBOL
 0x6b59fc5f	sock_no_sendmsg	vmlinux	EXPORT_SYMBOL
+0xfa32d573	get_task_exe_file	vmlinux	EXPORT_SYMBOL
 0x8d551bef	sysctl_tcp_rmem	vmlinux	EXPORT_SYMBOL
 0x1b9187a4	jbd2_journal_update_sb_errno	vmlinux	EXPORT_SYMBOL
 0x32360c9c	snd_dmaengine_pcm_open_request_chan	sound/core/snd-pcm-dmaengine	EXPORT_SYMBOL_GPL
@@ -7747,7 +7748,6 @@
 0xa036c4da	drm_modeset_lock_crtc	drivers/gpu/drm/drm	EXPORT_SYMBOL
 0x67937cdf	crypto_sha256_update	crypto/sha256_generic	EXPORT_SYMBOL
 0x3b0c1fe5	usb_get_status	vmlinux	EXPORT_SYMBOL_GPL
-0xf859794e	iov_iter_fault_in_multipages_readable	vmlinux	EXPORT_SYMBOL
 0x25c71277	dev_get_flags	vmlinux	EXPORT_SYMBOL
 0x77fa1a63	__wait_on_bit_lock	vmlinux	EXPORT_SYMBOL
 0xd77c0bc8	klist_remove	vmlinux	EXPORT_SYMBOL_GPL