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it is superseded by upstream commit 297c7cc4b5651b174a62925b6c961085f04979fd.
Remove pending/650-pppoe_header_pad.patch, it is superseded by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/ramips/patches-4.9/0040-nand-hack.patch

@@ -18,7 +18,7 @@
  			if (ret < 0) {
  				if (use_bufpoi)
  					/* Invalidate page cache */
-@@ -3206,8 +3210,11 @@ int nand_erase_nand(struct mtd_info *mtd
+@@ -3209,8 +3213,11 @@ int nand_erase_nand(struct mtd_info *mtd
  		    (page + pages_per_block))
  			chip->pagebuf = -1;
  
@@ -31,7 +31,7 @@
  		/*
  		 * See if operation failed and additional status checks are
  		 * available
-@@ -4401,6 +4408,7 @@ int nand_scan_ident(struct mtd_info *mtd
+@@ -4404,6 +4411,7 @@ int nand_scan_ident(struct mtd_info *mtd
  		 * cmdfunc() both expect cmd_ctrl() to be populated,
  		 * so we need to check that that's the case
  		 */

target/linux/ramips/patches-4.9/0901-spansion_nand_id_fix.patch

@@ -13,7 +13,7 @@ Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
 
 --- a/drivers/mtd/nand/nand_base.c
 +++ b/drivers/mtd/nand/nand_base.c
-@@ -3853,6 +3853,7 @@ static void nand_decode_ext_id(struct mt
+@@ -3856,6 +3856,7 @@ static void nand_decode_ext_id(struct mt
  	/*
  	 * Field definitions are in the following datasheets:
  	 * Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32)
@@ -21,7 +21,7 @@ Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
  	 * New Samsung (6 byte ID): Samsung K9GAG08U0F (p.44)
  	 * Hynix MLC   (6 byte ID): Hynix H27UBG8T2B (p.22)
  	 *
-@@ -3950,6 +3951,19 @@ static void nand_decode_ext_id(struct mt
+@@ -3953,6 +3954,19 @@ static void nand_decode_ext_id(struct mt
  		*busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
  
  		/*