Merge branch '2022-07-07-Kconfig-migrations-dead-code-removal' into next

- Migrate more CONFIG options to Kconfig and remove some unused code
  while we're at it.
diff --git a/configs/sam9x60ek_nandflash_defconfig b/configs/sam9x60ek_nandflash_defconfig
index 00ce9df..d8d2383 100644
--- a/configs/sam9x60ek_nandflash_defconfig
+++ b/configs/sam9x60ek_nandflash_defconfig
@@ -37,10 +37,10 @@
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
-CONFIG_CMD_SF_TEST=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_NAND=y
 CONFIG_CMD_NAND_TRIMFFS=y
+CONFIG_CMD_SF_TEST=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_BOOTP_BOOTFILESIZE=y
@@ -73,9 +73,7 @@
 CONFIG_ATMEL_NAND_HW_PMECC=y
 CONFIG_PMECC_CAP=8
 CONFIG_SYS_NAND_ONFI_DETECTION=y
-CONFIG_PHY_MICREL=y
 CONFIG_DM_SPI_FLASH=y
-CONFIG_SF_DEFAULT_BUS=0
 CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_SFDP_SUPPORT=y
 CONFIG_SPI_FLASH_ATMEL=y
@@ -83,6 +81,7 @@
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_SST=y
+CONFIG_PHY_MICREL=y
 CONFIG_DM_ETH=y
 CONFIG_MACB=y
 CONFIG_PINCTRL=y
@@ -90,11 +89,11 @@
 CONFIG_DM_SERIAL=y
 CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_ATMEL_USART=y
-CONFIG_SYSRESET=y
-CONFIG_SYSRESET_AT91=y
 CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_ATMEL_QSPI=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_AT91=y
 CONFIG_TIMER=y
 CONFIG_ATMEL_PIT_TIMER=y
 CONFIG_W1=y