generic: copy backport, hack, pending patch and config from 5.15 to 6.1

Copy backport, hack, pending patch and config from 5.15 to 6.1.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

target/linux/generic/pending-6.1/482-mtd-spi-nor-add-gd25q512.patch

@@ -0,0 +1,21 @@
+From f8943df3beb0d3f9754bb35320c3a378727175a8 Mon Sep 17 00:00:00 2001
+From: OpenWrt community <openwrt-devel@lists.openwrt.org>
+Date: Thu, 14 Jul 2022 08:38:07 +0200
+Subject: [PATCH] spi-nor/gigadevic: add gd25q512
+
+---
+ drivers/mtd/spi-nor/gigadevice.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/mtd/spi-nor/gigadevice.c
++++ b/drivers/mtd/spi-nor/gigadevice.c
+@@ -53,6 +53,9 @@ static const struct flash_info gigadevic
+ 			   SPI_NOR_4B_OPCODES | SPI_NOR_HAS_LOCK |
+ 			   SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6)
+ 		.fixups = &gd25q256_fixups },
++	{ "gd25q512", INFO(0xc84020, 0, 64 * 1024, 1024,
++			   SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
++			   SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_4B_OPCODES) },
+ };
+ 
+ const struct spi_nor_manufacturer spi_nor_gigadevice = {