ramips: add mt7620-nand driver for NAND flash

This add the mt7620-nand driver
and enable nand ubifs for subtarget mt7620

Signed-off-by: Chen Minqiang <ptpt52@gmail.com>

target/linux/ramips/mt7620/config-5.4

@@ -47,6 +47,11 @@ CONFIG_CPU_R4K_CACHE_TLB=y
 CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
 CONFIG_CPU_SUPPORTS_HIGHMEM=y
 CONFIG_CPU_SUPPORTS_MSA=y
+CONFIG_CRC16=y
+CONFIG_CRYPTO_ACOMP2=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_HASH_INFO=y
+CONFIG_CRYPTO_LZO=y
 CONFIG_CRYPTO_RNG2=y
 CONFIG_CSRC_R4K=y
 CONFIG_DEBUG_PINCTRL=y
@@ -142,6 +147,8 @@ CONFIG_IRQ_MIPS_CPU=y
 CONFIG_IRQ_WORK=y
 CONFIG_LIBFDT=y
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
+CONFIG_LZO_COMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
 CONFIG_MARVELL_PHY=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
@@ -165,6 +172,7 @@ CONFIG_MODULES_USE_ELF_REL=y
 # CONFIG_MT7621_WDT is not set
 # CONFIG_MTD_CFI_INTELEXT is not set
 CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_NAND_MT7620=y
 CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
@@ -173,6 +181,12 @@ CONFIG_MTD_SPLIT_JIMAGE_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_BEB_LIMIT=20
+CONFIG_MTD_UBI_BLOCK=y
+# CONFIG_MTD_UBI_FASTMAP is not set
+# CONFIG_MTD_UBI_GLUEBI is not set
+CONFIG_MTD_UBI_WL_THRESHOLD=4096
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NEED_PER_CPU_KM=y
 CONFIG_NET_RALINK_GSW_MT7620=y
@@ -213,6 +227,7 @@ CONFIG_RESET_CONTROLLER=y
 CONFIG_SERIAL_8250_RT288X=y
 CONFIG_SERIAL_MCTRL_GPIO=y
 CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SGL_ALLOC=y
 CONFIG_SOC_MT7620=y
 # CONFIG_SOC_MT7621 is not set
 # CONFIG_SOC_RT288X is not set
@@ -240,6 +255,14 @@ CONFIG_TICK_CPU_ACCOUNTING=y
 CONFIG_TIMER_OF=y
 CONFIG_TIMER_PROBE=y
 CONFIG_TINY_SRCU=y
+CONFIG_UBIFS_ATIME_SUPPORT=y
+CONFIG_UBIFS_FS=y
+CONFIG_UBIFS_FS_ADVANCED_COMPR=y
+CONFIG_UBIFS_FS_LZO=y
+CONFIG_UBIFS_FS_ZLIB=y
+# CONFIG_UBIFS_FS_ZSTD is not set
 CONFIG_USB_SUPPORT=y
 CONFIG_USE_OF=y
 CONFIG_WATCHDOG_CORE=y
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_ZLIB_INFLATE=y