kernel: bump 4.9 to 4.9.82

Refresh patches.
Remove upstreamed patches:
- ar7/002-MIPS-AR7-ensure-the-port-type-s-FCR-value-is-used.patch
- backport/040-crypto-fix-typo-in-KPP-dependency-of-CRYPTO_ECDH.patch
Remove layerscape/819-Revert-dmaengine-dmatest-move-callback-wait-queue-to.patch,
it is superseded by upstream commit 297c7cc4b5651b174a62925b6c961085f04979fd.
Remove pending/650-pppoe_header_pad.patch, it is superseded by
upstream commit 1bd21b158e07e0b8c5a2ce832305a0ebfe42c480.
Update patches that no longer apply:
- ar71xx/004-register_gpio_driver_earlier.patch
- hack/204-module_strip.patch
- pending/493-ubi-set-ROOT_DEV-to-ubiblock-rootfs-if-unset.patch

Fixes CVE-2017-8824.

Compile-tested: ar71xx.
Runtime-tested: ar71xx.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

target/linux/ar7/patches-4.9/002-MIPS-AR7-ensure-the-port-type-s-FCR-value-is-used.patch

@@ -1,48 +0,0 @@
-From ee6c9d41de084b2cefd90e5e0c9f30a35f6d3967 Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jonas.gorski@gmail.com>
-Date: Sun, 29 Oct 2017 15:50:42 +0100
-Subject: [PATCH RFC 3/3] MIPS: AR7: ensure the port type's FCR value is used
-
-Since commit aef9a7bd9b67 ("serial/uart/8250: Add tunable RX interrupt
-trigger I/F of FIFO buffers"), the port's default FCR value isn't used
-in serial8250_do_set_termios anymore, but copied over once in
-serial8250_config_port and then modified as needed.
-
-Unfortunately, serial8250_config_port will never be called if the port
-is shared between kernel and userspace, and the port's flag doesn't have
-UPF_BOOT_AUTOCONF, which would trigger a serial8250_config_port as well.
-
-This causes garbled output from userspace:
-
-[    5.220000] random: procd urandom read with 49 bits of entropy available
-ers
-   [kee
-
-Fix this by forcing it to be configured on boot, resulting in the
-expected output:
-
-[    5.250000] random: procd urandom read with 50 bits of entropy available
-Press the [f] key and hit [enter] to enter failsafe mode
-Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
-
-Fixes: aef9a7bd9b67 ("serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers")
-Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
----
-I'm not sure if this is just AR7's issue, or if this points to a general
-issue for UARTs used as kernel console and login console with the "fixed"
-commit.
-
- arch/mips/ar7/platform.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
---- a/arch/mips/ar7/platform.c
-+++ b/arch/mips/ar7/platform.c
-@@ -576,7 +576,7 @@ static int __init ar7_register_uarts(voi
- 	uart_port.type		= PORT_AR7;
- 	uart_port.uartclk	= clk_get_rate(bus_clk) / 2;
- 	uart_port.iotype	= UPIO_MEM32;
--	uart_port.flags		= UPF_FIXED_TYPE;
-+	uart_port.flags		= UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF;
- 	uart_port.regshift	= 2;
- 
- 	uart_port.line		= 0;