Convert CONFIG_ATMEL_USART to Kconfig

This converts the following to Kconfig:
   CONFIG_ATMEL_USART

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/at91rm9200ek_defconfig b/configs/at91rm9200ek_defconfig
index 2aaf879..a990360 100644
--- a/configs/at91rm9200ek_defconfig
+++ b/configs/at91rm9200ek_defconfig
@@ -29,6 +29,7 @@
 CONFIG_SYS_FLASH_PROTECTION=y
 CONFIG_SYS_FLASH_CFI=y
 CONFIG_MII=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
diff --git a/configs/at91rm9200ek_ram_defconfig b/configs/at91rm9200ek_ram_defconfig
index 9d2fc47..1433461 100644
--- a/configs/at91rm9200ek_ram_defconfig
+++ b/configs/at91rm9200ek_ram_defconfig
@@ -30,6 +30,7 @@
 CONFIG_SYS_FLASH_PROTECTION=y
 CONFIG_SYS_FLASH_CFI=y
 CONFIG_MII=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
diff --git a/configs/gurnard_defconfig b/configs/gurnard_defconfig
index a679c0f..5e0d6f7 100644
--- a/configs/gurnard_defconfig
+++ b/configs/gurnard_defconfig
@@ -39,6 +39,7 @@
 CONFIG_NAND_ATMEL=y
 CONFIG_ATMEL_NAND_HWECC=y
 CONFIG_PHYLIB=y
+CONFIG_ATMEL_USART=y
 CONFIG_TIMER=y
 CONFIG_ATMEL_PIT_TIMER=y
 CONFIG_USB=y
diff --git a/configs/picosam9g45_defconfig b/configs/picosam9g45_defconfig
index 2921f2d..03783a2 100644
--- a/configs/picosam9g45_defconfig
+++ b/configs/picosam9g45_defconfig
@@ -40,6 +40,7 @@
 CONFIG_DM=y
 CONFIG_SPL_DM=y
 CONFIG_AT91_GPIO=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
diff --git a/configs/smartweb_defconfig b/configs/smartweb_defconfig
index 4545c70..e7edb01 100644
--- a/configs/smartweb_defconfig
+++ b/configs/smartweb_defconfig
@@ -56,6 +56,7 @@
 # CONFIG_SYS_NAND_USE_FLASH_BBT is not set
 CONFIG_NAND_ATMEL=y
 CONFIG_PHYLIB=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_GADGET=y
diff --git a/configs/snapper9260_defconfig b/configs/snapper9260_defconfig
index 9e44395..fa46979 100644
--- a/configs/snapper9260_defconfig
+++ b/configs/snapper9260_defconfig
@@ -37,5 +37,6 @@
 CONFIG_MTD_RAW_NAND=y
 # CONFIG_SYS_NAND_USE_FLASH_BBT is not set
 CONFIG_NAND_ATMEL=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
diff --git a/configs/snapper9g20_defconfig b/configs/snapper9g20_defconfig
index e1c5c2e..abe0333 100644
--- a/configs/snapper9g20_defconfig
+++ b/configs/snapper9g20_defconfig
@@ -36,5 +36,6 @@
 CONFIG_MTD_RAW_NAND=y
 # CONFIG_SYS_NAND_USE_FLASH_BBT is not set
 CONFIG_NAND_ATMEL=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
diff --git a/configs/vinco_defconfig b/configs/vinco_defconfig
index 8ca7556..d4852ea 100644
--- a/configs/vinco_defconfig
+++ b/configs/vinco_defconfig
@@ -38,6 +38,7 @@
 CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_PHY_SMSC=y
 CONFIG_ETH_DESIGNWARE=y
+CONFIG_ATMEL_USART=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
diff --git a/configs/wb45n_defconfig b/configs/wb45n_defconfig
index d770e00..ef069a6 100644
--- a/configs/wb45n_defconfig
+++ b/configs/wb45n_defconfig
@@ -40,6 +40,7 @@
 CONFIG_NAND_ATMEL=y
 CONFIG_PMECC_CAP=4
 CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER=y
+CONFIG_ATMEL_USART=y
 CONFIG_LZMA=y
 CONFIG_LZO=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/wb50n_defconfig b/configs/wb50n_defconfig
index e764c30..1b444f0 100644
--- a/configs/wb50n_defconfig
+++ b/configs/wb50n_defconfig
@@ -43,5 +43,6 @@
 CONFIG_PHYLIB=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y
+CONFIG_ATMEL_USART=y
 CONFIG_LZMA=y
 CONFIG_OF_LIBFDT=y