Convert CONFIG_EFLASH_PROTSECTORS to Kconfig

This converts the following to Kconfig:
   CONFIG_EFLASH_PROTSECTORS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index b87639f..4fee977 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -327,6 +327,13 @@
 	  Enable the driver for the embedded flash used in the Atmel
 	  AT91SAM9XE devices.
 
+config EFLASH_PROTSECTORS
+	int "Number of flash sectors to protect from erasing"
+	depends on AT91_EFLASH
+	help
+	  If non-zero, this will be the number of sectors of the flash to disallow
+	  U-Boot to ease, starting from the beginning of flash.
+
 config AT91_GPIO_PULLUP
 	bool "Keep pullups on peripheral pins"
 	depends on CPU_ARM926EJS